Provide shared context to Platform API in renderer.

content/common/webkitplatformsupport_impl.h

Index: content/common/webkitplatformsupport_impl.h
diff --git a/content/common/webkitplatformsupport_impl.h b/content/common/webkitplatformsupport_impl.h
index 889fb753da73c7a6828c2cd6a6f5c007650c4594..67cba13b8e3d8e630124cae54fa67a998dac90f5 100644
--- a/content/common/webkitplatformsupport_impl.h
+++ b/content/common/webkitplatformsupport_impl.h
@@ -11,7 +11,6 @@
 #include "webkit/glue/webkitplatformsupport_impl.h"
 
 namespace content {
-class GpuChannelHostFactory;
 
 // This is a specialization of WebKitPlatformSupportImpl that implements the
 // embedder functions in terms of ContentClient.
@@ -35,14 +34,13 @@ class CONTENT_EXPORT WebKitPlatformSupportImpl
   virtual webkit_glue::WebSocketStreamHandleBridge* CreateWebSocketBridge(
       WebKit::WebSocketStreamHandle* handle,
       webkit_glue::WebSocketStreamHandleDelegate* delegate) OVERRIDE;
-  virtual WebKit::WebGraphicsContext3D* createOffscreenGraphicsContext3D(
-      const WebKit::WebGraphicsContext3D::Attributes& attributes);
 
+  // Override the offscreen context creation for the renderer.
   static void SetOffscreenContextFactoryForTest(
       OffscreenContextFactory factory);
 
  protected:
-  virtual GpuChannelHostFactory* GetGpuChannelHostFactory();
+  static OffscreenContextFactory* OffscreenContextFactoryForTest();
 };
 
 }  // namespace content