Disable automatic flushes on compositor contexts.

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc

 // Copyright (c) 2012 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 "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 
 #include "third_party/khronos/GLES2/gl2.h"
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES 1
 #endif
@@ skipping 325 matching lines @@
       !InitializeCommandBuffer(onscreen,
                                allowed_extensions)) {
     return false;
   }
 
   // Create the GLES2 helper, which writes the command buffer protocol.
   gles2_helper_ = new gpu::gles2::GLES2CmdHelper(command_buffer_);
   if (!gles2_helper_->Initialize(kCommandBufferSize))
     return false;
 
+  if (attributes_.noAutomaticFlushes)
+    gles2_helper_->SetAutomaticFlushes(false);
+
   // Create a transfer buffer used to copy resources between the renderer
   // process and the GPU process.
   transfer_buffer_ = new gpu::TransferBuffer(gles2_helper_);
 
   WebGraphicsContext3DCommandBufferImpl* share_group_context =
       g_all_shared_contexts.Pointer()->empty() ?
           NULL : *g_all_shared_contexts.Pointer()->begin();
 
   // Create the object exposing the OpenGL API.
   gl_ = new gpu::gles2::GLES2Implementation(
@@ skipping 1232 matching lines @@
     swap_client_->OnViewContextSwapBuffersAborted();
 }
 
 void WebGraphicsContext3DCommandBufferImpl::OnErrorMessage(
     const std::string& message, int id) {
   if (error_message_callback_) {
     WebKit::WebString str = WebKit::WebString::fromUTF8(message.c_str());
     error_message_callback_->onErrorMessage(str, id);
   }
 }