Fix skia ganesh resources leak.

webkit/common/gpu/grcontext_for_webgraphicscontext3d.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_COMMON_GPU_GRCONTEXT_FOR_WEBGRAPHICSCONTEXT3D_H_
 #define WEBKIT_COMMON_GPU_GRCONTEXT_FOR_WEBGRAPHICSCONTEXT3D_H_
 
 #include "base/basictypes.h"
 #include "skia/ext/refptr.h"
 #include "webkit/common/gpu/webkit_gpu_export.h"
 
 class GrContext;
 namespace blink { class WebGraphicsContext3D; }
 
 namespace webkit {
 namespace gpu {
 
 // This class binds an offscreen GrContext to an offscreen context3d. The
 // context3d is used by the GrContext so must be valid as long as this class
 // is alive.
 class WEBKIT_GPU_EXPORT GrContextForWebGraphicsContext3D {
  public:
   explicit GrContextForWebGraphicsContext3D(
       blink::WebGraphicsContext3D* context3d);
   virtual ~GrContextForWebGraphicsContext3D();
 
   GrContext* get() { return gr_context_.get(); }
 
+  void OnLostContext();
   void SetMemoryLimit(bool nonzero_allocation);
 
  private:
   skia::RefPtr<class GrContext> gr_context_;
 
   DISALLOW_COPY_AND_ASSIGN(GrContextForWebGraphicsContext3D);
 };
 
 }  // namespace gpu
 }  // namespace webkit
 
 #endif  // WEBKIT_COMMON_GPU_GRCONTEXT_FOR_WEBGRAPHICSCONTEXT3D_H_