Add picture-in-picture support for video (fixes issue #2776)

BUILD.gn

@@ -949,6 +949,12 @@ static_library("libcef_static") {
     deps += [ "//tools/v8_context_snapshot" ]
   }
 
+  if (toolkit_views) {
+    deps += [
+      "//ui/views",
+    ]
+  }
+
   if (use_aura) {
     sources += [
       "libcef/browser/native/window_delegate_view.cc",
@@ -1039,7 +1045,6 @@ static_library("libcef_static") {
 
     if (toolkit_views) {
       deps += [
-        "//ui/views",
         "//ui/views/controls/webview",
       ]
     }

libcef/browser/browser_host_impl.cc

@@ -42,6 +42,7 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
+#include "chrome/browser/picture_in_picture/picture_in_picture_window_manager.h"
 #include "chrome/browser/printing/print_view_manager.h"
 #include "chrome/browser/spellchecker/spellcheck_factory.h"
 #include "chrome/browser/spellchecker/spellcheck_service.h"
@@ -1503,6 +1504,11 @@ bool CefBrowserHostImpl::IsPrintPreviewSupported() const {
   return !IsWindowless();
 }
 
+bool CefBrowserHostImpl::IsPictureInPictureSupported() const {
+  // Not currently supported with OSR.
+  return !IsWindowless();
+}
+
 void CefBrowserHostImpl::WindowDestroyed() {
   CEF_REQUIRE_UIT();
   DCHECK(!window_destroyed_);
@@ -2501,6 +2507,23 @@ bool CefBrowserHostImpl::IsNeverVisible(content::WebContents* web_contents) {
   return false;
 }
 
+content::PictureInPictureResult CefBrowserHostImpl::EnterPictureInPicture(
+    content::WebContents* web_contents,
+    const viz::SurfaceId& surface_id,
+    const gfx::Size& natural_size) {
+  if (!IsPictureInPictureSupported()) {
+    return content::PictureInPictureResult::kNotSupported;
+  }
+
+  return PictureInPictureWindowManager::GetInstance()->EnterPictureInPicture(
+      web_contents, surface_id, natural_size);
+}
+
+void CefBrowserHostImpl::ExitPictureInPicture() {
+  DCHECK(IsPictureInPictureSupported());
+  PictureInPictureWindowManager::GetInstance()->ExitPictureInPicture();
+}
+
 // content::WebContentsObserver methods.
 // -----------------------------------------------------------------------------
 

libcef/browser/browser_host_impl.h

@@ -277,6 +277,9 @@ class CefBrowserHostImpl : public CefBrowserHost,
   // Returns true if this browser supports print preview.
   bool IsPrintPreviewSupported() const;
 
+  // Returns true if this browser supports picture-in-picture.
+  bool IsPictureInPictureSupported() const;
+
   // Called when the OS window hosting the browser is destroyed.
   void WindowDestroyed();
 
@@ -458,6 +461,11 @@ class CefBrowserHostImpl : public CefBrowserHost,
                                   const GURL& security_origin,
                                   blink::mojom::MediaStreamType type) override;
   bool IsNeverVisible(content::WebContents* web_contents) override;
+  content::PictureInPictureResult EnterPictureInPicture(
+      content::WebContents* web_contents,
+      const viz::SurfaceId& surface_id,
+      const gfx::Size& natural_size) override;
+  void ExitPictureInPicture() override;
 
   // content::WebContentsObserver methods.
   using content::WebContentsObserver::BeforeUnloadFired;

libcef/browser/browser_main.cc

@@ -46,7 +46,6 @@
 #if defined(USE_AURA)
 #include "ui/aura/env.h"
 #include "ui/display/screen.h"
-#include "ui/views/test/desktop_test_views_delegate.h"
 #include "ui/views/widget/desktop_aura/desktop_screen.h"
 #include "ui/wm/core/wm_state.h"
 
@@ -55,6 +54,15 @@
 #endif
 #endif  // defined(USE_AURA)
 
+#if defined(TOOLKIT_VIEWS)
+#if defined(OS_MACOSX)
+#include "chrome/browser/ui/views/chrome_layout_provider.h"
+#include "chrome/browser/ui/views/chrome_views_delegate.h"
+#else
+#include "ui/views/test/desktop_test_views_delegate.h"
+#endif
+#endif  // defined(TOOLKIT_VIEWS)
+
 #if defined(USE_AURA) && defined(OS_LINUX)
 #include "ui/base/ime/init/input_method_initializer.h"
 #endif
@@ -91,8 +99,6 @@ void CefBrowserMainParts::ToolkitInitialized() {
 #if defined(USE_AURA)
   CHECK(aura::Env::GetInstance());
 
-  new views::DesktopTestViewsDelegate;
-
   wm_state_.reset(new wm::WMState);
 
 #if defined(OS_WIN)
@@ -100,6 +106,15 @@ void CefBrowserMainParts::ToolkitInitialized() {
       CefContentBrowserClient::Get()->GetResourceDllName());
 #endif
 #endif  // defined(USE_AURA)
+
+#if defined(TOOLKIT_VIEWS)
+#if defined(OS_MACOSX)
+  views_delegate_ = std::make_unique<ChromeViewsDelegate>();
+  layout_provider_ = ChromeLayoutProvider::CreateLayoutProvider();
+#else
+  views_delegate_ = std::make_unique<views::DesktopTestViewsDelegate>();
+#endif
+#endif  // defined(TOOLKIT_VIEWS)
 }
 
 void CefBrowserMainParts::PreMainMessageLoopStart() {
@@ -207,8 +222,10 @@ void CefBrowserMainParts::PostDestroyThreads() {
     extensions_browser_client_.reset();
   }
 
-#if defined(USE_AURA)
+#if defined(TOOLKIT_VIEWS)
-  // Delete the DesktopTestViewsDelegate.
+  views_delegate_.reset();
-  delete views::ViewsDelegate::GetInstance();
+#if defined(OS_MACOSX)
+  layout_provider_.reset();
 #endif
+#endif  // defined(TOOLKIT_VIEWS)
 }

libcef/browser/browser_main.h

@@ -29,6 +29,15 @@ class WMState;
 }
 #endif
 
+#if defined(TOOLKIT_VIEWS)
+namespace views {
+class ViewsDelegate;
+#if defined(OS_MACOSX)
+class LayoutProvider;
+#endif
+}
+#endif  // defined(TOOLKIT_VIEWS)
+
 class CefDevToolsDelegate;
 
 class CefBrowserMainParts : public content::BrowserMainParts {
@@ -85,6 +94,13 @@ class CefBrowserMainParts : public content::BrowserMainParts {
   std::unique_ptr<wm::WMState> wm_state_;
 #endif
 
+#if defined(TOOLKIT_VIEWS)
+  std::unique_ptr<views::ViewsDelegate> views_delegate_;
+#if defined(OS_MACOSX)
+  std::unique_ptr<views::LayoutProvider> layout_provider_;
+#endif
+#endif  // defined(TOOLKIT_VIEWS)
+
   DISALLOW_COPY_AND_ASSIGN(CefBrowserMainParts);
 };
 

libcef/browser/content_browser_client.cc

@@ -1362,6 +1362,18 @@ bool CefContentBrowserClient::HandleExternalProtocol(
   return true;
 }
 
+std::unique_ptr<content::OverlayWindow>
+CefContentBrowserClient::CreateWindowForPictureInPicture(
+    content::PictureInPictureWindowController* controller) {
+  // Note: content::OverlayWindow::Create() is defined by platform-specific
+  // implementation in chrome/browser/ui/views. This layering hack, which goes
+  // through //content and ContentBrowserClient, allows us to work around the
+  // dependency constraints that disallow directly calling
+  // chrome/browser/ui/views code either from here or from other code in
+  // chrome/browser.
+  return content::OverlayWindow::Create(controller);
+}
+
 std::string CefContentBrowserClient::GetProduct() {
   // Match the logic in chrome_content_browser_client.cc GetProduct().
   return ::GetProduct();

libcef/browser/content_browser_client.h

@@ -193,6 +193,8 @@ class CefContentBrowserClient : public content::ContentBrowserClient {
       const network::ResourceRequest& request,
       network::mojom::URLLoaderFactoryRequest* factory_request,
       network::mojom::URLLoaderFactoryPtr* out_factory) override;
+  std::unique_ptr<content::OverlayWindow> CreateWindowForPictureInPicture(
+      content::PictureInPictureWindowController* controller) override;
 
   std::string GetProduct() override;
   std::string GetChromeProduct() override;

libcef/browser/prefs/renderer_prefs.cc

@@ -342,12 +342,13 @@ void PopulateWebPreferences(content::RenderViewHost* rvh,
   // Set preferences based on the extension.
   SetExtensionPrefs(rvh, web);
 
-  // Set preferences based on CefBrowserSettings.
+  if (browser) {
-  if (browser)
+    // Set preferences based on CefBrowserSettings.
     SetCefPrefs(browser->settings(), web);
 
-  // Set the background color for the WebView.
+    web.picture_in_picture_enabled = browser->IsPictureInPictureSupported();
-  if (browser) {
+
+    // Set the background color for the WebView.
     web.base_background_color = browser->GetBackgroundColor();
   } else {
     // We don't know for sure that the browser will be windowless but assume