Merge 92520 - [chromium] Accelerated canvas breaks when moving canvases or resources between Pages

Source/WebCore/platform/graphics/chromium/WebGLLayerChromium.cpp

 /*
  * 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 31 matching lines @@
 namespace WebCore {
 
 PassRefPtr<WebGLLayerChromium> WebGLLayerChromium::create(GraphicsLayerChromium* owner)
 {
     return adoptRef(new WebGLLayerChromium(owner));
 }
 
 WebGLLayerChromium::WebGLLayerChromium(GraphicsLayerChromium* owner)
     : CanvasLayerChromium(owner)
     , m_context(0)
+    , m_textureId(0)
+    , m_textureChanged(true)
     , m_contextSupportsRateLimitingExtension(false)
     , m_rateLimitingTimer(this, &WebGLLayerChromium::rateLimitContext)
     , m_textureUpdated(false)
 {
 }
 
 WebGLLayerChromium::~WebGLLayerChromium()
 {
     if (m_context && layerRenderer())
         layerRenderer()->removeChildContext(m_context);
@@ skipping 110 matching lines @@
 
     if (!m_context)
         return;
 
     Extensions3DChromium* extensions = static_cast<Extensions3DChromium*>(m_context->getExtensions());
     extensions->rateLimitOffscreenContextCHROMIUM();
 }
 
 }
 #endif // USE(ACCELERATED_COMPOSITING)