WIP - WebMediaPlayer switch media renderer.

third_party/WebKit/Source/web/FullscreenController.cpp

Index: third_party/WebKit/Source/web/FullscreenController.cpp
diff --git a/third_party/WebKit/Source/web/FullscreenController.cpp b/third_party/WebKit/Source/web/FullscreenController.cpp
index 1d0f0fcc1cfe818faf7921877ab15ccf4eba3ca6..b0ae9ac1248e731b2ec5f48f444a1fb87795be4f 100644
--- a/third_party/WebKit/Source/web/FullscreenController.cpp
+++ b/third_party/WebKit/Source/web/FullscreenController.cpp
@@ -40,6 +40,7 @@
 #include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/WebLayerTreeView.h"
 #include "public/web/WebFrameClient.h"
+#include "third_party/WebKit/Source/core/dom/TagCollection.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WebSettingsImpl.h"
 #include "web/WebViewImpl.h"
@@ -88,6 +89,10 @@ void FullscreenController::didEnterFullscreen()
         HTMLVideoElement* videoElement = toHTMLVideoElement(element);
         if (videoElement->usesOverlayFullscreenVideo() && m_webViewImpl->layerTreeView())
             m_webViewImpl->layerTreeView()->setHasTransparentBackground(true);
+    } else {
+        // Notify all the video descendants that it enters full screen.
+        for (HTMLVideoElement& videoElement : Traversal<HTMLVideoElement>::descendantsOf(*element))
+            videoElement.parentEnteredFullscreen();
     }
 }
 
@@ -120,6 +125,11 @@ void FullscreenController::didExitFullscreen()
                     m_needsScrollAndScaleRestore = true;
 
                 fullscreen->didExitFullscreen();
+                if (!isHTMLVideoElement(element)) {
+                    // Notify all the video descendants that it exits full screen.
+                    for (HTMLVideoElement& videoElement : Traversal<HTMLVideoElement>::descendantsOf(*element))
+                        videoElement.parentExitedFullscreen();
+                }
             }
         }
     }