cef/patch/patches/print_header_footer_1478_1565.patch

diff --git chrome/browser/ui/BUILD.gn chrome/browser/ui/BUILD.gn
index c50380806706..011b63531a33 100644
--- chrome/browser/ui/BUILD.gn
+++ chrome/browser/ui/BUILD.gn
@@ -919,6 +919,7 @@ split_static_library("ui") {
     "//base:i18n",
     "//base/allocator:buildflags",
     "//cc/paint",
+    "//cef/libcef/features",
     "//chrome:extra_resources",
     "//chrome:resources",
     "//chrome:strings",
diff --git chrome/browser/ui/cocoa/applescript/tab_applescript.mm chrome/browser/ui/cocoa/applescript/tab_applescript.mm
index e5ac419b8f4c..ced62e390bc4 100644
--- chrome/browser/ui/cocoa/applescript/tab_applescript.mm
+++ chrome/browser/ui/cocoa/applescript/tab_applescript.mm
@@ -9,7 +9,7 @@
 #include "base/logging.h"
 #import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
-#include "chrome/browser/printing/print_view_manager.h"
+#include "cef/libcef/features/features.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/ui/cocoa/applescript/apple_event_util.h"
@@ -27,6 +27,10 @@
 #include "content/public/browser/web_contents_delegate.h"
 #include "url/gurl.h"
 
+#if !BUILDFLAG(ENABLE_CEF)
+#include "chrome/browser/printing/print_view_manager.h"
+#endif
+
 using content::NavigationController;
 using content::NavigationEntry;
 using content::OpenURLParams;
@@ -232,11 +236,15 @@ void ResumeAppleEventAndSendReply(NSAppleEventManagerSuspensionID suspension_id,
 
 - (void)handlesPrintScriptCommand:(NSScriptCommand*)command {
   AppleScript::LogAppleScriptUMA(AppleScript::AppleScriptCommand::TAB_PRINT);
+#if !BUILDFLAG(ENABLE_CEF)
   bool initiated = printing::PrintViewManager::FromWebContents(webContents_)
                        ->PrintNow(webContents_->GetMainFrame());
   if (!initiated) {
     AppleScript::SetError(AppleScript::errInitiatePrinting);
   }
+#else
+  NOTIMPLEMENTED();
+#endif
 }
 
 - (void)handlesSaveScriptCommand:(NSScriptCommand*)command {
diff --git chrome/browser/ui/webui/settings/printing_handler.cc chrome/browser/ui/webui/settings/printing_handler.cc
index 45644030eb24..c894209e1530 100644
--- chrome/browser/ui/webui/settings/printing_handler.cc
+++ chrome/browser/ui/webui/settings/printing_handler.cc
@@ -6,9 +6,13 @@
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
-#include "chrome/browser/printing/printer_manager_dialog.h"
+#include "cef/libcef/features/features.h"
 #include "content/public/browser/web_ui.h"
 
+#if !BUILDFLAG(ENABLE_CEF)
+#include "chrome/browser/printing/printer_manager_dialog.h"
+#endif
+
 namespace settings {
 
 PrintingHandler::PrintingHandler() {}
@@ -27,7 +31,11 @@ void PrintingHandler::OnJavascriptAllowed() {}
 void PrintingHandler::OnJavascriptDisallowed() {}
 
 void PrintingHandler::HandleOpenSystemPrintDialog(const base::ListValue* args) {
+#if !BUILDFLAG(ENABLE_CEF)
   printing::PrinterManagerDialog::ShowPrinterManagerDialog();
+#else
+  NOTIMPLEMENTED();
+#endif
 }
 
 }  // namespace settings
diff --git chrome/common/chrome_utility_printing_messages.h chrome/common/chrome_utility_printing_messages.h
index 6dfe3b430d7d..82e3ab03bdc4 100644
--- chrome/common/chrome_utility_printing_messages.h
+++ chrome/common/chrome_utility_printing_messages.h
@@ -16,7 +16,7 @@
 
 #define IPC_MESSAGE_START ChromeUtilityPrintingMsgStart
 
-#if defined(OS_WIN) && BUILDFLAG(ENABLE_PRINT_PREVIEW)
+#if defined(OS_WIN)
 // Preview and Cloud Print messages.
 IPC_STRUCT_TRAITS_BEGIN(printing::PrinterCapsAndDefaults)
   IPC_STRUCT_TRAITS_MEMBER(printer_capabilities)
@@ -94,6 +94,6 @@ IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_GetPrinterCapsAndDefaults_Failed,
 IPC_MESSAGE_CONTROL1(
   ChromeUtilityHostMsg_GetPrinterSemanticCapsAndDefaults_Failed,
   std::string /* printer name */)
-#endif  // defined(OS_WIN) && BUILDFLAG(ENABLE_PRINT_PREVIEW)
+#endif  // defined(OS_WIN)
 
 #endif  // CHROME_COMMON_CHROME_UTILITY_PRINTING_MESSAGES_H_
diff --git chrome/utility/printing_handler.h chrome/utility/printing_handler.h
index b56deaf18589..3d931b55686f 100644
--- chrome/utility/printing_handler.h
+++ chrome/utility/printing_handler.h
@@ -11,7 +11,7 @@
 #include "build/build_config.h"
 #include "printing/features/features.h"
 
-#if !defined(OS_WIN) || !BUILDFLAG(ENABLE_PRINT_PREVIEW)
+#if !defined(OS_WIN)
 #error "Windows printing and print preview must be enabled"
 #endif
 
diff --git components/printing/common/print_messages.cc components/printing/common/print_messages.cc
index 6df98550d22d..3192faf033f8 100644
--- components/printing/common/print_messages.cc
+++ components/printing/common/print_messages.cc
@@ -148,7 +148,6 @@ PrintMsg_PrintFrame_Params::PrintMsg_PrintFrame_Params() {}
 
 PrintMsg_PrintFrame_Params::~PrintMsg_PrintFrame_Params() {}
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 PrintHostMsg_RequestPrintPreview_Params::
     PrintHostMsg_RequestPrintPreview_Params()
     : is_modifiable(false),
@@ -170,4 +169,3 @@ PrintHostMsg_SetOptionsFromDocument_Params::
 PrintHostMsg_SetOptionsFromDocument_Params::
     ~PrintHostMsg_SetOptionsFromDocument_Params() {
 }
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
diff --git components/printing/common/print_messages.h components/printing/common/print_messages.h
index 22469f97d1f9..fd303fd1e764 100644
--- components/printing/common/print_messages.h
+++ components/printing/common/print_messages.h
@@ -85,7 +85,6 @@ struct PrintMsg_PrintFrame_Params {
   int document_cookie;
 };
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 struct PrintHostMsg_RequestPrintPreview_Params {
   PrintHostMsg_RequestPrintPreview_Params();
   ~PrintHostMsg_RequestPrintPreview_Params();
@@ -104,7 +103,6 @@ struct PrintHostMsg_SetOptionsFromDocument_Params {
   printing::DuplexMode duplex;
   printing::PageRanges page_ranges;
 };
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 #endif  // INTERNAL_COMPONENTS_PRINTING_COMMON_PRINT_MESSAGES_H_
 
@@ -198,7 +196,6 @@ IPC_STRUCT_TRAITS_BEGIN(printing::PageRange)
   IPC_STRUCT_TRAITS_MEMBER(to)
 IPC_STRUCT_TRAITS_END()
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 IPC_STRUCT_TRAITS_BEGIN(PrintHostMsg_RequestPrintPreview_Params)
   IPC_STRUCT_TRAITS_MEMBER(is_modifiable)
   IPC_STRUCT_TRAITS_MEMBER(webnode_only)
@@ -219,7 +216,6 @@ IPC_STRUCT_TRAITS_BEGIN(PrintHostMsg_SetOptionsFromDocument_Params)
   // Specifies page range to be printed.
   IPC_STRUCT_TRAITS_MEMBER(page_ranges)
 IPC_STRUCT_TRAITS_END()
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 IPC_STRUCT_TRAITS_BEGIN(printing::PageSizeMargins)
   IPC_STRUCT_TRAITS_MEMBER(content_width)
@@ -264,7 +260,6 @@ IPC_STRUCT_BEGIN(PrintHostMsg_DidPrintContent_Params)
   IPC_STRUCT_MEMBER(printing::ContentToProxyIdMap, subframe_content_info)
 IPC_STRUCT_END()
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 // Parameters to describe a rendered document.
 IPC_STRUCT_BEGIN(PrintHostMsg_DidPreviewDocument_Params)
   // Document's content including metafile data and subframe info.
@@ -309,7 +304,6 @@ IPC_STRUCT_BEGIN(PrintHostMsg_DidGetPreviewPageCount_Params)
   // The id of the preview request.
   IPC_STRUCT_MEMBER(int, preview_request_id)
 IPC_STRUCT_END()
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 // Parameters to describe a rendered page.
 IPC_STRUCT_BEGIN(PrintHostMsg_DidPrintDocument_Params)
@@ -345,10 +339,8 @@ IPC_STRUCT_END()
 
 // Messages sent from the browser to the renderer.
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 // Tells the RenderFrame to initiate print preview for the entire document.
 IPC_MESSAGE_ROUTED1(PrintMsg_InitiatePrintPreview, bool /* has_selection */)
-#endif
 
 // Tells the RenderFrame to initiate printing or print preview for a particular
 // node, depending on which mode the RenderFrame is in.
@@ -373,13 +365,13 @@ IPC_MESSAGE_ROUTED1(PrintMsg_PrintingDone,
 // Tells the RenderFrame whether printing is enabled or not.
 IPC_MESSAGE_ROUTED1(PrintMsg_SetPrintingEnabled, bool /* enabled */)
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 // Tells the RenderFrame to switch the CSS to print media type, renders every
 // requested pages for print preview using the given |settings|. This gets
 // called multiple times as the user updates settings.
 IPC_MESSAGE_ROUTED1(PrintMsg_PrintPreview,
                     base::DictionaryValue /* settings */)
 
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 // Tells the RenderFrame that print preview dialog was closed.
 IPC_MESSAGE_ROUTED0(PrintMsg_ClosePrintPreviewDialog)
 #endif
@@ -445,7 +437,6 @@ IPC_MESSAGE_CONTROL3(PrintHostMsg_TempFileForPrintingWritten,
                      int /* page count */)
 #endif  // defined(OS_ANDROID)
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 // Asks the browser to do print preview.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_RequestPrintPreview,
                     PrintHostMsg_RequestPrintPreview_Params /* params */)
@@ -479,7 +470,6 @@ IPC_SYNC_MESSAGE_ROUTED2_1(PrintHostMsg_CheckForCancel,
 // The memory handle in this message is already valid in the browser process.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_MetafileReadyForPrinting,
                     PrintHostMsg_DidPreviewDocument_Params /* params */)
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 // This is sent when there are invalid printer settings.
 IPC_MESSAGE_ROUTED0(PrintHostMsg_ShowInvalidPrinterSettingsError)
@@ -488,7 +478,6 @@ IPC_MESSAGE_ROUTED0(PrintHostMsg_ShowInvalidPrinterSettingsError)
 IPC_MESSAGE_ROUTED1(PrintHostMsg_PrintingFailed,
                     int /* document cookie */)
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 // Tell the browser print preview failed.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_PrintPreviewFailed,
                     int /* document cookie */)
@@ -515,6 +504,5 @@ IPC_MESSAGE_ROUTED1(PrintHostMsg_ShowScriptedPrintPreview,
 // Notify the browser to set print presets based on source PDF document.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_SetOptionsFromDocument,
                     PrintHostMsg_SetOptionsFromDocument_Params /* params */)
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 #endif  // COMPONENTS_PRINTING_COMMON_PRINT_MESSAGES_H_
diff --git components/printing/renderer/print_render_frame_helper.cc components/printing/renderer/print_render_frame_helper.cc
index 2d81ba90d69c..0f70f15f2deb 100644
--- components/printing/renderer/print_render_frame_helper.cc
+++ components/printing/renderer/print_render_frame_helper.cc
@@ -326,7 +326,6 @@ bool PrintingNodeOrPdfFrame(const blink::WebLocalFrame* frame,
   return plugin && plugin->SupportsPaginatedPrint();
 }
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 // Returns true if the current destination printer is PRINT_TO_PDF.
 bool IsPrintToPdfRequested(const base::DictionaryValue& job_settings) {
   bool print_to_pdf = false;
@@ -348,7 +347,6 @@ bool PrintingFrameHasPageSizeStyle(blink::WebLocalFrame* frame,
   }
   return frame_has_custom_page_size_style;
 }
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 #if BUILDFLAG(ENABLE_PRINTING)
 // Disable scaling when either:
@@ -405,7 +403,6 @@ MarginType GetMarginsForPdf(blink::WebLocalFrame* frame,
 }
 #endif
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 bool FitToPageEnabled(const base::DictionaryValue& job_settings) {
   bool fit_to_paper_size = false;
   if (!job_settings.GetBoolean(kSettingFitToPageEnabled, &fit_to_paper_size)) {
@@ -447,7 +444,6 @@ blink::WebPrintScalingOption GetPrintScalingOption(
   }
   return blink::kWebPrintScalingOptionFitToPrintableArea;
 }
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 // Helper function to scale and round an integer value with a double valued
 // scaling.
@@ -951,6 +947,7 @@ PrintRenderFrameHelper::PrintRenderFrameHelper(
       notify_browser_of_print_failure_(true),
       delegate_(std::move(delegate)),
       print_node_in_progress_(false),
+      force_print_preview_(false),
       is_loading_(false),
       is_scripted_preview_delayed_(false),
       ipc_nesting_level_(0),
@@ -1012,10 +1009,8 @@ void PrintRenderFrameHelper::ScriptedPrint(bool user_initiated) {
     return;
 
   if (g_is_preview_enabled) {
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
     print_preview_context_.InitWithFrame(web_frame);
     RequestPrintPreview(PRINT_PREVIEW_SCRIPTED);
-#endif
   } else {
 #if BUILDFLAG(ENABLE_BASIC_PRINTING)
     auto weak_this = weak_ptr_factory_.GetWeakPtr();
@@ -1047,10 +1042,10 @@ bool PrintRenderFrameHelper::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(PrintMsg_PrintPages, OnPrintPages)
     IPC_MESSAGE_HANDLER(PrintMsg_PrintForSystemDialog, OnPrintForSystemDialog)
 #endif  // BUILDFLAG(ENABLE_BASIC_PRINTING)
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
     IPC_MESSAGE_HANDLER(PrintMsg_InitiatePrintPreview, OnInitiatePrintPreview)
     IPC_MESSAGE_HANDLER(PrintMsg_PrintPreview, OnPrintPreview)
     IPC_MESSAGE_HANDLER(PrintMsg_PrintingDone, OnPrintingDone)
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
     IPC_MESSAGE_HANDLER(PrintMsg_ClosePrintPreviewDialog,
                         OnClosePrintPreviewDialog)
 #endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
@@ -1134,7 +1129,6 @@ void PrintRenderFrameHelper::UpdateFrameMarginsCssInfo(
   ignore_css_margins_ = (margins_type != DEFAULT_MARGINS);
 }
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 void PrintRenderFrameHelper::OnPrintPreview(
     const base::DictionaryValue& settings) {
   if (ipc_nesting_level_ > 1)
@@ -1319,7 +1313,6 @@ bool PrintRenderFrameHelper::CreatePreviewDocument() {
   return true;
 }
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 bool PrintRenderFrameHelper::RenderPreviewPage(
     int page_number,
     const PrintMsg_Print_Params& print_params) {
@@ -1347,7 +1340,6 @@ bool PrintRenderFrameHelper::RenderPreviewPage(
           print_params.printed_doc_type);
   return PreviewPageRendered(page_number, std::move(metafile));
 }
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 bool PrintRenderFrameHelper::FinalizePrintReadyDocument() {
   DCHECK(!is_print_ready_metafile_sent_);
@@ -1375,7 +1367,6 @@ bool PrintRenderFrameHelper::FinalizePrintReadyDocument() {
   Send(new PrintHostMsg_MetafileReadyForPrinting(routing_id(), preview_params));
   return true;
 }
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 void PrintRenderFrameHelper::OnPrintingDone(bool success) {
   if (ipc_nesting_level_ > 1)
@@ -1390,7 +1381,6 @@ void PrintRenderFrameHelper::OnSetPrintingEnabled(bool enabled) {
   is_printing_enabled_ = enabled;
 }
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 void PrintRenderFrameHelper::OnInitiatePrintPreview(bool has_selection) {
   if (ipc_nesting_level_ > 1)
     return;
@@ -1401,7 +1391,9 @@ void PrintRenderFrameHelper::OnInitiatePrintPreview(bool has_selection) {
   // that instead.
   auto plugin = delegate_->GetPdfElement(frame);
   if (!plugin.IsNull()) {
+    force_print_preview_ = true;
     PrintNode(plugin);
+    force_print_preview_ = false;
     return;
   }
   print_preview_context_.InitWithFrame(frame);
@@ -1410,10 +1402,11 @@ void PrintRenderFrameHelper::OnInitiatePrintPreview(bool has_selection) {
                           : PRINT_PREVIEW_USER_INITIATED_ENTIRE_FRAME);
 }
 
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 void PrintRenderFrameHelper::OnClosePrintPreviewDialog() {
   print_preview_context_.source_frame()->DispatchAfterPrintEvent();
 }
-#endif
+#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 void PrintRenderFrameHelper::OnPrintFrameContent(
     const PrintMsg_PrintFrame_Params& params) {
@@ -1497,11 +1490,9 @@ void PrintRenderFrameHelper::PrintNode(const blink::WebNode& node) {
 
   print_node_in_progress_ = true;
 
-  if (g_is_preview_enabled) {
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
+  if (g_is_preview_enabled || force_print_preview_) {
     print_preview_context_.InitWithNode(node);
     RequestPrintPreview(PRINT_PREVIEW_USER_INITIATED_CONTEXT_NODE);
-#endif
   } else {
 #if BUILDFLAG(ENABLE_BASIC_PRINTING)
     // Make a copy of the node, in case RenderView::OnContextMenuClosed() resets
@@ -1595,7 +1586,6 @@ void PrintRenderFrameHelper::DidFinishPrinting(PrintingResult result) {
       }
       break;
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
     case FAIL_PREVIEW:
       if (!is_print_ready_metafile_sent_) {
         if (notify_browser_of_print_failure_) {
@@ -1612,7 +1602,6 @@ void PrintRenderFrameHelper::DidFinishPrinting(PrintingResult result) {
                                                                cookie));
       print_preview_context_.Failed(false);
       break;
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
   }
   prep_frame_view_.reset();
   print_pages_params_.reset();
@@ -1782,7 +1771,6 @@ bool PrintRenderFrameHelper::CalculateNumberOfPages(blink::WebLocalFrame* frame,
   return true;
 }
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 bool PrintRenderFrameHelper::SetOptionsFromPdfDocument(
     PrintHostMsg_SetOptionsFromDocument_Params* options) {
   blink::WebLocalFrame* source_frame = print_preview_context_.source_frame();
@@ -1876,7 +1864,6 @@ bool PrintRenderFrameHelper::UpdatePrintSettings(
   print_preview_context_.set_error(PREVIEW_ERROR_INVALID_PRINTER_SETTINGS);
   return false;
 }
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 #if BUILDFLAG(ENABLE_BASIC_PRINTING)
 void PrintRenderFrameHelper::GetPrintSettingsFromUser(
@@ -2034,7 +2021,6 @@ bool PrintRenderFrameHelper::CopyMetafileDataToReadOnlySharedMem(
   return true;
 }
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 void PrintRenderFrameHelper::ShowScriptedPrintPreview() {
   if (is_scripted_preview_delayed_) {
     is_scripted_preview_delayed_ = false;
@@ -2157,7 +2143,6 @@ bool PrintRenderFrameHelper::PreviewPageRendered(
   Send(new PrintHostMsg_DidPreviewPage(routing_id(), preview_page_params));
   return true;
 }
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 PrintRenderFrameHelper::PrintPreviewContext::PrintPreviewContext()
     : total_page_count_(0),
diff --git components/printing/renderer/print_render_frame_helper.h components/printing/renderer/print_render_frame_helper.h
index 64a6dd6a1912..8c87d7565eca 100644
--- components/printing/renderer/print_render_frame_helper.h
+++ components/printing/renderer/print_render_frame_helper.h
@@ -145,10 +145,8 @@ class PrintRenderFrameHelper
     OK,
     FAIL_PRINT_INIT,
     FAIL_PRINT,
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
     FAIL_PREVIEW,
     INVALID_SETTINGS,
-#endif
   };
 
   // These values are persisted to logs. Entries should not be renumbered and
@@ -186,9 +184,9 @@ class PrintRenderFrameHelper
   void OnPrintPages();
   void OnPrintForSystemDialog();
 #endif  // BUILDFLAG(ENABLE_BASIC_PRINTING)
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   void OnInitiatePrintPreview(bool has_selection);
   void OnPrintPreview(const base::DictionaryValue& settings);
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   void OnClosePrintPreviewDialog();
 #endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
   void OnPrintFrameContent(const PrintMsg_PrintFrame_Params& params);
@@ -204,7 +202,6 @@ class PrintRenderFrameHelper
   // Update |ignore_css_margins_| based on settings.
   void UpdateFrameMarginsCssInfo(const base::DictionaryValue& settings);
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   // Prepare frame for creating preview document.
   void PrepareFrameForPreviewDocument();
 
@@ -221,7 +218,6 @@ class PrintRenderFrameHelper
 
   // Finalize the print ready preview document.
   bool FinalizePrintReadyDocument();
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
   // Enable/Disable printing.
   void OnSetPrintingEnabled(bool enabled);
@@ -251,7 +247,6 @@ class PrintRenderFrameHelper
                               const blink::WebNode& node,
                               int* number_of_pages);
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   // Set options for print preset from source PDF document.
   bool SetOptionsFromPdfDocument(
       PrintHostMsg_SetOptionsFromDocument_Params* options);
@@ -262,7 +257,6 @@ class PrintRenderFrameHelper
   bool UpdatePrintSettings(blink::WebLocalFrame* frame,
                            const blink::WebNode& node,
                            const base::DictionaryValue& passed_job_settings);
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 #if BUILDFLAG(ENABLE_BASIC_PRINTING)
   // Get final print settings from the user.
@@ -348,7 +342,6 @@ class PrintRenderFrameHelper
   bool IsScriptInitiatedPrintAllowed(blink::WebLocalFrame* frame,
                                      bool user_initiated);
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   // Shows scripted print preview when options from plugin are available.
   void ShowScriptedPrintPreview();
 
@@ -367,7 +360,6 @@ class PrintRenderFrameHelper
   // Returns true if print preview should continue, false on failure.
   bool PreviewPageRendered(int page_number,
                            std::unique_ptr<PdfMetafileSkia> metafile);
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
   void SetPrintPagesParams(const PrintMsg_PrintPages_Params& settings);
 
@@ -521,6 +513,7 @@ class PrintRenderFrameHelper
   ScriptingThrottler scripting_throttler_;
 
   bool print_node_in_progress_;
+  bool force_print_preview_;
   PrintPreviewContext print_preview_context_;
   bool is_loading_;
   bool is_scripted_preview_delayed_;
diff --git components/pwg_encoder/BUILD.gn components/pwg_encoder/BUILD.gn
index 452c53bff69f..abb4dc0e6219 100644
--- components/pwg_encoder/BUILD.gn
+++ components/pwg_encoder/BUILD.gn
@@ -4,8 +4,6 @@
 
 import("//printing/features/features.gni")
 
-assert(enable_print_preview)
-
 static_library("pwg_encoder") {
   sources = [
     "bitmap_image.cc",