Split ExtensionMessageFilter up into a UI thread part and an IO thread part.

chrome/browser/extensions/chrome_content_browser_client_extensions_part.cc

 // Copyright 2014 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/browser/extensions/chrome_content_browser_client_extensions_part.h"
 
 #include <set>
 
 #include "base/command_line.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 18 matching lines @@
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_switches.h"
 #include "extensions/browser/api/web_request/web_request_api.h"
 #include "extensions/browser/api/web_request/web_request_api_helpers.h"
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_message_filter.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/guest_view/guest_view_message_filter.h"
 #include "extensions/browser/info_map.h"
+#include "extensions/browser/io_thread_extension_message_filter.h"
 #include "extensions/browser/view_type_utils.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/manifest_handlers/background_info.h"
 #include "extensions/common/manifest_handlers/web_accessible_resources_info.h"
 #include "extensions/common/switches.h"
 
 using content::BrowserContext;
 using content::BrowserThread;
 using content::BrowserURLHandler;
 using content::RenderViewHost;
@@ skipping 337 matching lines @@
                  site_instance->GetProcess()->GetID()));
 }
 
 void ChromeContentBrowserClientExtensionsPart::RenderProcessWillLaunch(
     content::RenderProcessHost* host) {
   int id = host->GetID();
   Profile* profile = Profile::FromBrowserContext(host->GetBrowserContext());
 
   host->AddFilter(new ChromeExtensionMessageFilter(id, profile));
   host->AddFilter(new ExtensionMessageFilter(id, profile));
+  host->AddFilter(new IOThreadExtensionMessageFilter(id, profile));
   host->AddFilter(new GuestViewMessageFilter(id, profile));
   extension_web_request_api_helpers::SendExtensionWebRequestStatusToHost(host);
 }
 
 void ChromeContentBrowserClientExtensionsPart::SiteInstanceGotProcess(
     SiteInstance* site_instance) {
   BrowserContext* context = site_instance->GetProcess()->GetBrowserContext();
   ExtensionRegistry* registry = ExtensionRegistry::Get(context);
   if (!registry)
     return;
@@ skipping 114 matching lines @@
     command_line->AppendSwitch(::switches::kEnableWebRtcHWH264Encoding);
 #endif
     if (base::CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kEnableMojoSerialService)) {
       command_line->AppendSwitch(switches::kEnableMojoSerialService);
     }
   }
 }
 
 }  // namespace extensions