Added Pepper 3D render context that instantiates the GPU plugin....

chrome/renderer/webplugin_delegate_proxy.cc

 // Copyright (c) 2009 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 "chrome/renderer/webplugin_delegate_proxy.h"
 
 #include <algorithm>
 
 #if defined(OS_LINUX)
 #include <gtk/gtk.h>
@@ skipping 1135 matching lines @@
 #if defined(ENABLE_GPU)
   int command_buffer_id;
   if (!Send(new PluginMsg_CreateCommandBuffer(instance_id_,
                                               &command_buffer_id))) {
     return NULL;
   }
 
   return new CommandBufferProxy(channel_host_, command_buffer_id);
 #else
   return NULL;
-#endif
+#endif  // ENABLE_GPU
 }
 
 void WebPluginDelegateProxy::OnCancelDocumentLoad() {
   plugin_->CancelDocumentLoad();
 }
 
 void WebPluginDelegateProxy::OnInitiateHTTPRangeRequest(
     const std::string& url, const std::string& range_info,
     intptr_t existing_stream, bool notify_needed, intptr_t notify_data) {
   plugin_->InitiateHTTPRangeRequest(url.c_str(), range_info.c_str(),
@@ skipping 19 matching lines @@
   // prior to the UpdateGeometry message now being acknowledged are known to
   // be no longer needed.  Release them, and take the stale entry out of the
   // map.
   ReleaseTransportDIB(iterator->second.backing_store.get());
   ReleaseTransportDIB(iterator->second.transport_store.get());
   ReleaseTransportDIB(iterator->second.background_store.get());
 
   old_transport_dibs_.erase(iterator);
 }
 #endif