Move ExtensionSystem into extensions namespace

chrome/browser/extensions/extension_process_manager.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 "base/bind.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
@@ skipping 321 matching lines @@
 
   return result;
 }
 
 const Extension* ExtensionProcessManager::GetExtensionForRenderViewHost(
     content::RenderViewHost* render_view_host) {
   if (!render_view_host->GetSiteInstance())
     return NULL;
 
   ExtensionService* service =
-      ExtensionSystem::Get(GetProfile())->extension_service();
+      extensions::ExtensionSystem::Get(GetProfile())->extension_service();
   return service->extensions()->GetByID(GetExtensionID(render_view_host));
 }
 
 void ExtensionProcessManager::RegisterRenderViewHost(
     RenderViewHost* render_view_host,
     const Extension* extension) {
   all_extension_views_[render_view_host] = chrome::VIEW_TYPE_INVALID;
 }
 
 void ExtensionProcessManager::UnregisterRenderViewHost(
@@ skipping 426 matching lines @@
         if (service && service->is_ready())
           CreateBackgroundHostsForProfileStartup(this, service->extensions());
       }
       break;
     }
     default:
       ExtensionProcessManager::Observe(type, source, details);
       break;
   }
 }