Merge 98185 - [chromium] Make setVisibility extension- and thread-correct

Source/WebKit/chromium/public/WebGraphicsContext3D.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 @@
     virtual bool makeContextCurrent() = 0;
 
     // The size of the region into which this WebGraphicsContext3D is rendering.
     // Returns the last values passed to reshape().
     virtual int width() = 0;
     virtual int height() = 0;
 
     // Resizes the region into which this WebGraphicsContext3D is drawing.
     virtual void reshape(int width, int height) = 0;
 
+    // GL_CHROMIUM_setVisibility - Changes the visibility of the backbuffer
+    virtual void setVisibilityCHROMIUM(bool visible) { }
+
     // Query whether it is built on top of compliant GLES2 implementation.
     virtual bool isGLES2Compliant() = 0;
 
     virtual bool setParentContext(WebGraphicsContext3D* parentContext) { return false; }
 
     // Helper for software compositing path. Reads back the frame buffer into
     // the memory region pointed to by "pixels" with size "bufferSize". It is
     // expected that the storage for "pixels" covers (4 * width * height) bytes.
     // Returns true on success.
     virtual bool readBackFramebuffer(unsigned char* pixels, size_t bufferSize, WebGLId framebuffer, int width, int height) = 0;
@@ skipping 219 matching lines @@
 protected:
 #if WEBKIT_USING_SKIA
     virtual GrGLInterface* onCreateGrGLInterface() { return 0; }
 #endif
 
 };
 
 } // namespace WebKit
 
 #endif