Attach flag to use virtual context for WebGraphicsContext3D

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 301 matching lines @@
   attribs.push_back(NONE);
 
   // Create a proxy to a command buffer in the GPU process.
   if (onscreen) {
     command_buffer_ = host_->CreateViewCommandBuffer(
         surface_id_,
         share_group,
         allowed_extensions,
         attribs,
         active_url_,
+        attributes_.useVirtualContext,
         gpu_preference_);
   } else {
     command_buffer_ = host_->CreateOffscreenCommandBuffer(
         gfx::Size(1, 1),
         share_group,
         allowed_extensions,
         attribs,
         active_url_,
+        attributes_.useVirtualContext,
         gpu_preference_);
   }
 
   if (!command_buffer_)
     return false;
 
   // Initialize the command buffer.
   return command_buffer_->Initialize();
 }
 
@@ skipping 1404 matching lines @@
 
 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);
   }
 }
 
 }  // namespace content