Merge 113677 - [chromium] Viewport is not filled when out of texture memory on mac

Source/Platform/chromium/public/WebLayerTreeView.h

Index: Source/Platform/chromium/public/WebLayerTreeView.h
===================================================================
--- Source/Platform/chromium/public/WebLayerTreeView.h	(revision 114754)
+++ Source/Platform/chromium/public/WebLayerTreeView.h	(working copy)
@@ -26,6 +26,7 @@
 #ifndef WebLayerTreeView_h
 #define WebLayerTreeView_h
 
+#include "WebColor.h"
 #include "WebCommon.h"
 #include "WebPrivatePtr.h"
 
@@ -108,6 +109,9 @@
     WEBKIT_EXPORT void setViewportSize(const WebSize&);
     WEBKIT_EXPORT WebSize viewportSize() const;
 
+    // Sets the background color for the viewport.
+    WEBKIT_EXPORT void setBackgroundColor(WebColor);
+
     // Sets whether this view is visible. In threaded mode, a view that is not visible will not
     // composite or trigger updateAnimations() or layout() calls until it becomes visible.
     WEBKIT_EXPORT void setVisible(bool);