Add CCDelegatingRenderer, and corresponding IPCs

cc/CCRendererGL.cpp

 // Copyright 2010 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.
 
 
 #include "config.h"
 
 #if USE(ACCELERATED_COMPOSITING)
 #include "CCRendererGL.h"
 
@@ skipping 87 matching lines @@
     base::SplitString(extensionsString, ' ', &extensionsList);
     std::set<string> extensions(extensionsList.begin(), extensionsList.end());
 
     if (settings().acceleratePainting && extensions.count("GL_EXT_texture_format_BGRA8888")
                                       && extensions.count("GL_EXT_read_format_bgra"))
         m_capabilities.usingAcceleratedPainting = true;
     else
         m_capabilities.usingAcceleratedPainting = false;
 
 
-    m_capabilities.contextHasCachedFrontBuffer = extensions.count("GL_CHROMIUM_front_buffer_cached");
-
     m_capabilities.usingPartialSwap = CCSettings::partialSwapEnabled() && extensions.count("GL_CHROMIUM_post_sub_buffer");
 
     // Use the swapBuffers callback only with the threaded proxy.
     if (CCProxy::hasImplThread())
         m_capabilities.usingSwapCompleteCallback = extensions.count("GL_CHROMIUM_swapbuffers_complete_callback");
     if (m_capabilities.usingSwapCompleteCallback)
         m_context->setSwapBuffersCompleteCallbackCHROMIUM(this);
 
     m_capabilities.usingSetVisibility = extensions.count("GL_CHROMIUM_set_visibility");
 
@@ skipping 1401 matching lines @@
 }
 
 bool CCRendererGL::isContextLost()
 {
     return (m_context->getGraphicsResetStatusARB() != GraphicsContext3D::NO_ERROR);
 }
 
 } // namespace cc
 
 #endif // USE(ACCELERATED_COMPOSITING)