Let the WebMediaPlayer decide whether to use overlay video.

Source/core/layout/compositing/DeprecatedPaintLayerCompositor.cpp

 /*
  * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 19 matching lines @@
 #include "core/animation/AnimationTimeline.h"
 #include "core/animation/DocumentAnimations.h"
 #include "core/dom/DOMNodeIds.h"
 #include "core/dom/Fullscreen.h"
 #include "core/editing/FrameSelection.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLIFrameElement.h"
+#include "core/html/HTMLVideoElement.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/layout/LayoutPart.h"
 #include "core/layout/LayoutVideo.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/compositing/CompositedDeprecatedPaintLayerMapping.h"
 #include "core/layout/compositing/CompositingInputsUpdater.h"
 #include "core/layout/compositing/CompositingLayerAssigner.h"
 #include "core/layout/compositing/CompositingRequirementsUpdater.h"
 #include "core/layout/compositing/GraphicsLayerTreeBuilder.h"
 #include "core/layout/compositing/GraphicsLayerUpdater.h"
@@ skipping 224 matching lines @@
 #if ENABLE(ASSERT)
 
 void DeprecatedPaintLayerCompositor::assertNoUnresolvedDirtyBits()
 {
     ASSERT(m_pendingUpdateType == CompositingUpdateNone);
     ASSERT(!m_rootShouldAlwaysCompositeDirty);
 }
 
 #endif
 
-void DeprecatedPaintLayerCompositor::applyOverlayFullscreenVideoAdjustment()
+void DeprecatedPaintLayerCompositor::applyOverlayFullscreenVideoAdjustmentIfNeeded()
 {
     m_inOverlayFullscreenVideo = false;
     if (!m_rootContentLayer)
         return;
 
     bool isLocalRoot = m_layoutView.frame()->isLocalRoot();
     LayoutVideo* video = findFullscreenVideoLayoutObject(m_layoutView.document());
-    if (!video || !video->layer()->hasCompositedDeprecatedPaintLayerMapping()) {
+    if (!video || !video->layer()->hasCompositedDeprecatedPaintLayerMapping() || !video->videoElement()->usesOverlayFullscreenVideo()) {
         if (isLocalRoot) {
             GraphicsLayer* backgroundLayer = fixedRootBackgroundLayer();
             if (backgroundLayer && !backgroundLayer->parent())
                 rootFixedBackgroundsChanged();
         }
         return;
     }
 
     GraphicsLayer* videoLayer = video->layer()->compositedDeprecatedPaintLayerMapping()->mainGraphicsLayer();
 
@@ skipping 104 matching lines @@
         {
             TRACE_EVENT0("blink", "GraphicsLayerTreeBuilder::rebuild");
             GraphicsLayerTreeBuilder().rebuild(*updateRoot, ancestorInfo);
         }
 
         if (childList.isEmpty())
             destroyRootLayer();
         else
             m_rootContentLayer->setChildren(childList);
 
-        if (RuntimeEnabledFeatures::overlayFullscreenVideoEnabled())
-            applyOverlayFullscreenVideoAdjustment();
+        applyOverlayFullscreenVideoAdjustmentIfNeeded();
     }
 
     if (m_needsUpdateFixedBackground) {
         rootFixedBackgroundsChanged();
         m_needsUpdateFixedBackground = false;
     }
 
     for (unsigned i = 0; i < layersNeedingPaintInvalidation.size(); i++)
         forceRecomputePaintInvalidationRectsIncludingNonCompositingDescendants(layersNeedingPaintInvalidation[i]->layoutObject());
 
@@ skipping 779 matching lines @@
     } else if (graphicsLayer == m_scrollLayer.get()) {
         name = "LocalFrame Scrolling Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink