diff --git a/include/capi/cef_print_handler_capi.h b/include/capi/cef_print_handler_capi.h
index 497595435..fbafd6e38 100644
--- a/include/capi/cef_print_handler_capi.h
+++ b/include/capi/cef_print_handler_capi.h
@@ -33,7 +33,7 @@
 // by hand. See the translator.README.txt file in the tools directory for
 // more information.
 //
-// $hash=ed78ca41d62dfc0cdb52828dcf795617c4e231a7$
+// $hash=897f5b1ec6ed7430fff156f47b4ce6371d5db6f2$
 //
 
 #ifndef CEF_INCLUDE_CAPI_CEF_PRINT_HANDLER_CAPI_H_
@@ -148,7 +148,6 @@ typedef struct _cef_print_handler_t {
   ///
   cef_size_t(CEF_CALLBACK* get_pdf_paper_size)(
       struct _cef_print_handler_t* self,
-      struct _cef_browser_t* browser,
       int device_units_per_inch);
 } cef_print_handler_t;
 
diff --git a/include/cef_print_handler.h b/include/cef_print_handler.h
index 950764acd..c668bd4cf 100644
--- a/include/cef_print_handler.h
+++ b/include/cef_print_handler.h
@@ -133,8 +133,7 @@ class CefPrintHandler : public virtual CefBaseRefCounted {
   // CefBrowserHost::PrintToPDF().
   ///
   /*--cef()--*/
-  virtual CefSize GetPdfPaperSize(CefRefPtr<CefBrowser> browser,
-                                  int device_units_per_inch) {
+  virtual CefSize GetPdfPaperSize(int device_units_per_inch) {
     return CefSize();
   }
 };
diff --git a/libcef/browser/printing/print_dialog_linux.cc b/libcef/browser/printing/print_dialog_linux.cc
index a9b44fe79..f73ca0efa 100644
--- a/libcef/browser/printing/print_dialog_linux.cc
+++ b/libcef/browser/printing/print_dialog_linux.cc
@@ -113,12 +113,9 @@ gfx::Size CefPrintDialogLinux::GetPdfPaperSize(
     if (browser_handler.get()) {
       CefRefPtr<CefPrintHandler> handler = browser_handler->GetPrintHandler();
       if (handler.get()) {
-        CefRefPtr<CefBrowserHostImpl> browser =
-            extensions::GetOwnerBrowserForFrame(
-                context->render_process_id(), context->render_frame_id(), NULL);
         const printing::PrintSettings& settings = context->settings();
-        CefSize cef_size = handler->GetPdfPaperSize(
-            browser.get(), settings.device_units_per_inch());
+        CefSize cef_size =
+            handler->GetPdfPaperSize(settings.device_units_per_inch());
         size.SetSize(cef_size.width, cef_size.height);
       }
     }
diff --git a/libcef_dll/cpptoc/print_handler_cpptoc.cc b/libcef_dll/cpptoc/print_handler_cpptoc.cc
index f82a03a09..aee68793a 100644
--- a/libcef_dll/cpptoc/print_handler_cpptoc.cc
+++ b/libcef_dll/cpptoc/print_handler_cpptoc.cc
@@ -9,7 +9,7 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=80fc869800987a74f4c6e4eb202f0f5201126a76$
+// $hash=eba15f068169c3d986c5b44ed55aa472f47a9081$
 //
 
 #include "libcef_dll/cpptoc/print_handler_cpptoc.h"
@@ -150,21 +150,16 @@ print_handler_on_print_reset(struct _cef_print_handler_t* self,
 
 cef_size_t CEF_CALLBACK
 print_handler_get_pdf_paper_size(struct _cef_print_handler_t* self,
-                                 cef_browser_t* browser,
                                  int device_units_per_inch) {
   // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
 
   DCHECK(self);
   if (!self)
     return CefSize();
-  // Verify param: browser; type: refptr_diff
-  DCHECK(browser);
-  if (!browser)
-    return CefSize();
 
   // Execute
-  cef_size_t _retval = CefPrintHandlerCppToC::Get(self)->GetPdfPaperSize(
-      CefBrowserCToCpp::Wrap(browser), device_units_per_inch);
+  cef_size_t _retval =
+      CefPrintHandlerCppToC::Get(self)->GetPdfPaperSize(device_units_per_inch);
 
   // Return type: simple
   return _retval;
diff --git a/libcef_dll/ctocpp/print_handler_ctocpp.cc b/libcef_dll/ctocpp/print_handler_ctocpp.cc
index 9e89d542a..faa0381af 100644
--- a/libcef_dll/ctocpp/print_handler_ctocpp.cc
+++ b/libcef_dll/ctocpp/print_handler_ctocpp.cc
@@ -9,7 +9,7 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=80679bfc067e7564eadb691876081c4176b04c4f$
+// $hash=81ba68d1a06a25947aa4533d2c50fff945c54fd0$
 //
 
 #include "libcef_dll/ctocpp/print_handler_ctocpp.h"
@@ -142,22 +142,16 @@ void CefPrintHandlerCToCpp::OnPrintReset(CefRefPtr<CefBrowser> browser) {
   _struct->on_print_reset(_struct, CefBrowserCppToC::Wrap(browser));
 }
 
-CefSize CefPrintHandlerCToCpp::GetPdfPaperSize(CefRefPtr<CefBrowser> browser,
-                                               int device_units_per_inch) {
+CefSize CefPrintHandlerCToCpp::GetPdfPaperSize(int device_units_per_inch) {
   cef_print_handler_t* _struct = GetStruct();
   if (CEF_MEMBER_MISSING(_struct, get_pdf_paper_size))
     return CefSize();
 
   // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
 
-  // Verify param: browser; type: refptr_diff
-  DCHECK(browser.get());
-  if (!browser.get())
-    return CefSize();
-
   // Execute
-  cef_size_t _retval = _struct->get_pdf_paper_size(
-      _struct, CefBrowserCppToC::Wrap(browser), device_units_per_inch);
+  cef_size_t _retval =
+      _struct->get_pdf_paper_size(_struct, device_units_per_inch);
 
   // Return type: simple
   return _retval;
diff --git a/libcef_dll/ctocpp/print_handler_ctocpp.h b/libcef_dll/ctocpp/print_handler_ctocpp.h
index de792ec04..168e8644f 100644
--- a/libcef_dll/ctocpp/print_handler_ctocpp.h
+++ b/libcef_dll/ctocpp/print_handler_ctocpp.h
@@ -9,7 +9,7 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=1a2adb6e9cbbe96253cc997312e60ca330dc4de6$
+// $hash=4a628ee393964285a7ad6f2a6c64cff8a88c3b20$
 //
 
 #ifndef CEF_LIBCEF_DLL_CTOCPP_PRINT_HANDLER_CTOCPP_H_
@@ -45,8 +45,7 @@ class CefPrintHandlerCToCpp : public CefCToCppRefCounted<CefPrintHandlerCToCpp,
                   const CefString& pdf_file_path,
                   CefRefPtr<CefPrintJobCallback> callback) override;
   void OnPrintReset(CefRefPtr<CefBrowser> browser) override;
-  CefSize GetPdfPaperSize(CefRefPtr<CefBrowser> browser,
-                          int device_units_per_inch) override;
+  CefSize GetPdfPaperSize(int device_units_per_inch) override;
 };
 
 #endif  // CEF_LIBCEF_DLL_CTOCPP_PRINT_HANDLER_CTOCPP_H_
diff --git a/tests/cefclient/browser/print_handler_gtk.cc b/tests/cefclient/browser/print_handler_gtk.cc
index 263e4546a..d00f0431b 100644
--- a/tests/cefclient/browser/print_handler_gtk.cc
+++ b/tests/cefclient/browser/print_handler_gtk.cc
@@ -547,6 +547,8 @@ ClientPrintHandlerGtk::~ClientPrintHandlerGtk() {
 }
 
 void ClientPrintHandlerGtk::OnPrintStart(CefRefPtr<CefBrowser> browser) {
+  CEF_REQUIRE_UI_THREAD();
+
   const int browser_id = browser->GetIdentifier();
 
 #ifndef _NDEBUG
@@ -564,6 +566,8 @@ void ClientPrintHandlerGtk::OnPrintSettings(
     CefRefPtr<CefBrowser> browser,
     CefRefPtr<CefPrintSettings> settings,
     bool get_defaults) {
+  CEF_REQUIRE_UI_THREAD();
+
   GetPrintHandler(browser)->OnPrintSettings(settings, get_defaults);
 }
 
@@ -571,6 +575,8 @@ bool ClientPrintHandlerGtk::OnPrintDialog(
     CefRefPtr<CefBrowser> browser,
     bool has_selection,
     CefRefPtr<CefPrintDialogCallback> callback) {
+  CEF_REQUIRE_UI_THREAD();
+
   return GetPrintHandler(browser)->OnPrintDialog(has_selection, callback);
 }
 
@@ -579,11 +585,15 @@ bool ClientPrintHandlerGtk::OnPrintJob(
     const CefString& document_name,
     const CefString& pdf_file_path,
     CefRefPtr<CefPrintJobCallback> callback) {
+  CEF_REQUIRE_UI_THREAD();
+
   return GetPrintHandler(browser)->OnPrintJob(document_name, pdf_file_path,
                                               callback);
 }
 
 void ClientPrintHandlerGtk::OnPrintReset(CefRefPtr<CefBrowser> browser) {
+  CEF_REQUIRE_UI_THREAD();
+
   // Delete the print handler.
   PrintHandlerMap::iterator it =
       print_handler_map_.find(browser->GetIdentifier());
@@ -592,8 +602,9 @@ void ClientPrintHandlerGtk::OnPrintReset(CefRefPtr<CefBrowser> browser) {
   print_handler_map_.erase(it);
 }
 
-CefSize ClientPrintHandlerGtk::GetPdfPaperSize(CefRefPtr<CefBrowser> browser,
-                                               int device_units_per_inch) {
+CefSize ClientPrintHandlerGtk::GetPdfPaperSize(int device_units_per_inch) {
+  CEF_REQUIRE_UI_THREAD();
+
   GtkPageSetup* page_setup = gtk_page_setup_new();
 
   float width = gtk_page_setup_get_paper_width(page_setup, GTK_UNIT_INCH);
diff --git a/tests/cefclient/browser/print_handler_gtk.h b/tests/cefclient/browser/print_handler_gtk.h
index 0aa8f85a2..857b8c724 100644
--- a/tests/cefclient/browser/print_handler_gtk.h
+++ b/tests/cefclient/browser/print_handler_gtk.h
@@ -31,8 +31,7 @@ class ClientPrintHandlerGtk : public CefPrintHandler {
                   const CefString& pdf_file_path,
                   CefRefPtr<CefPrintJobCallback> callback) OVERRIDE;
   void OnPrintReset(CefRefPtr<CefBrowser> browser) OVERRIDE;
-  CefSize GetPdfPaperSize(CefRefPtr<CefBrowser> browser,
-                          int device_units_per_inch) OVERRIDE;
+  CefSize GetPdfPaperSize(int device_units_per_inch) OVERRIDE;
 
  private:
   // Print handler.