Merge 145856 "Check to ensure MultisampleRenderbuffer creation s..."

Source/WebCore/platform/graphics/gpu/DrawingBuffer.h

 /*
  * Copyright (c) 2010, 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 122 matching lines @@
 #endif
 
     GraphicsContext3D* graphicsContext3D() const { return m_context.get(); }
 
 private:
     DrawingBuffer(GraphicsContext3D*, const IntSize&, bool multisampleExtensionSupported,
                   bool packedDepthStencilExtensionSupported, PreserveDrawingBuffer, AlphaRequirement);
 
     void initialize(const IntSize&);
 
+    bool checkBufferIntegrity();
+
     PreserveDrawingBuffer m_preserveDrawingBuffer;
     AlphaRequirement m_alpha;
     bool m_scissorEnabled;
     Platform3DObject m_texture2DBinding;
     Platform3DObject m_framebufferBinding;
     GC3Denum m_activeTextureUnit;
 
     RefPtr<GraphicsContext3D> m_context;
     IntSize m_size;
     bool m_multisampleExtensionSupported;
@@ skipping 22 matching lines @@
 #endif
 
 #if PLATFORM(MAC)
     RetainPtr<WebGLLayer> m_platformLayer;
 #endif
 };
 
 } // namespace WebCore
 
 #endif // DrawingBuffer_h