Revert of Remove WebViewImpl::setIsAcceleratedCompositingActive

Source/web/WebViewImpl.h

Index: Source/web/WebViewImpl.h
diff --git a/Source/web/WebViewImpl.h b/Source/web/WebViewImpl.h
index 0c3aed340055f3e7924cfd234d12dc7c3b0a0825..da89c2ecc07dce9c8be5eb062322819f6273698b 100644
--- a/Source/web/WebViewImpl.h
+++ b/Source/web/WebViewImpl.h
@@ -740,6 +740,9 @@
     GraphicsLayer* m_rootGraphicsLayer;
     GraphicsLayer* m_rootTransformLayer;
     OwnPtr<GraphicsLayerFactory> m_graphicsLayerFactory;
+    bool m_isAcceleratedCompositingActive;
+    bool m_layerTreeViewCommitsDeferred;
+    bool m_layerTreeViewClosed;
     bool m_matchesHeuristicsForGpuRasterization;
     // If true, the graphics context is being restored.
     bool m_recreatingGraphicsContext;
@@ -755,7 +758,10 @@
     OwnPtrWillBePersistent<FullscreenController> m_fullscreenController;
 
     bool m_showFPSCounter;
+    bool m_showPaintRects;
+    bool m_showDebugBorders;
     bool m_continuousPaintingEnabled;
+    bool m_showScrollBottleneckRects;
     WebColor m_baseBackgroundColor;
     WebColor m_backgroundColorOverride;
     float m_zoomFactorOverride;