Delete //gpu/blink/ and WebGraphicsContext3DImpl.

third_party/WebKit/public/platform/WebGraphicsContext3D.h

 /*
  * Copyright (C) 2012 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebGraphicsContext3D_h
 #define WebGraphicsContext3D_h
 
 #include "WebNonCopyable.h"
 
 namespace blink {
-class WebString;
-
-// This interface abstracts the operations performed by the
-// GraphicsContext3D in order to implement WebGL. Nearly all of the
-// methods exposed on this interface map directly to entry points in
-// the OpenGL ES 2.0 API.
 class WebGraphicsContext3D : public WebNonCopyable {
 public:
-    class WebGraphicsContextLostCallback {
-    public:
-        virtual void onContextLost() = 0;
-
-    protected:
-        virtual ~WebGraphicsContextLostCallback() { }
-    };
-
-    // This destructor needs to be public so that using classes can destroy instances if initialization fails.
     virtual ~WebGraphicsContext3D() { }
 };
 
 } // namespace blink
 
 #endif