Add support for Attachment Brokering of IPC::Channels on multiple threads.

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 111 matching lines @@
 #include "content/common/frame_messages.h"
 #include "content/common/gpu/gpu_host_messages.h"
 #include "content/common/in_process_child_thread_params.h"
 #include "content/common/mojo/channel_init.h"
 #include "content/common/mojo/mojo_messages.h"
 #include "content/common/render_process_messages.h"
 #include "content/common/resource_messages.h"
 #include "content/common/site_isolation_policy.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/navigator_connect_context.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host_factory.h"
 #include "content/public/browser/render_process_host_observer.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_iterator.h"
 #include "content/public/browser/render_widget_host_view_frame_subscriber.h"
 #include "content/public/browser/resource_context.h"
@@ skipping 589 matching lines @@
 
   channel_connected_ = false;
   sent_render_process_ready_ = false;
 
   // Setup the IPC channel.
   const std::string channel_id =
       IPC::Channel::GenerateVerifiedChannelID(std::string());
   channel_ = CreateChannelProxy(channel_id);
 #if USE_ATTACHMENT_BROKER
   IPC::AttachmentBroker::GetGlobal()->RegisterCommunicationChannel(
-      channel_.get());
+      channel_.get(), content::BrowserThread::GetMessageLoopProxyForThread(
+      content::BrowserThread::IO));
 #endif
 
   // Setup the Mojo channel.
   mojo_application_host_->Init();
 
   // Call the embedder first so that their IPC filters have priority.
   GetContentClient()->browser()->RenderProcessWillLaunch(this);
 
   CreateMessageFilters();
   RegisterMojoServices();
@@ skipping 2054 matching lines @@
 
     // Skip widgets in other processes.
     if (rvh->GetProcess()->GetID() != GetID())
       continue;
 
     rvh->OnWebkitPreferencesChanged();
   }
 }
 
 }  // namespace content