Expose WEBGL_debug_renderer_info through a chromium finch experiment.

Source/web/FrameLoaderClientImpl.h

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 130 matching lines @@
     virtual void didChangeName(const String&);
 
     virtual void dispatchWillOpenSocketStream(WebCore::SocketStreamHandle*) OVERRIDE;
 
     virtual void dispatchWillStartUsingPeerConnectionHandler(WebCore::RTCPeerConnectionHandler*) OVERRIDE;
 
     virtual void didRequestAutocomplete(PassRefPtr<WebCore::FormState>) OVERRIDE;
 
     virtual bool allowWebGL(bool enabledPerSettings) OVERRIDE;
     virtual void didLoseWebGLContext(int arbRobustnessContextLostReason) OVERRIDE;
+    virtual bool allowWebGLDebugRendererInfo() OVERRIDE;
 
     virtual void dispatchWillInsertBody() OVERRIDE;
 
     virtual PassOwnPtr<WebServiceWorkerProvider> createServiceWorkerProvider(PassOwnPtr<WebServiceWorkerProviderClient>) OVERRIDE;
 
     virtual void didStopAllLoaders() OVERRIDE;
 
 private:
     virtual bool isFrameLoaderClientImpl() const OVERRIDE { return true; }
 
     PassOwnPtr<WebPluginLoadObserver> pluginLoadObserver();
 
     // The WebFrame that owns this object and manages its lifetime. Therefore,
     // the web frame object is guaranteed to exist.
     WebFrameImpl* m_webFrame;
 };
 
 inline FrameLoaderClientImpl* toFrameLoaderClientImpl(WebCore::FrameLoaderClient* client)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!client || client->isFrameLoaderClientImpl());
     return static_cast<FrameLoaderClientImpl*>(client);
 }
 
 } // namespace WebKit
 
 #endif