Move ExtensionHost into extensions namespace

chrome/browser/ui/webui/extensions/extension_settings_handler.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 "chrome/browser/ui/webui/extensions/extension_settings_handler.h"
 
 #include "base/auto_reset.h"
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 553 matching lines @@
     DCHECK(extension);
 
     Profile* profile = extension_service_->profile();
     if (incognito)
       profile = profile->GetOffTheRecordProfile();
 
     ExtensionProcessManager* pm = profile->GetExtensionProcessManager();
     extensions::LazyBackgroundTaskQueue* queue =
         extensions::ExtensionSystem::Get(profile)->lazy_background_task_queue();
 
-    ExtensionHost* host = pm->GetBackgroundHostForExtension(extension->id());
+    extensions::ExtensionHost* host =
+        pm->GetBackgroundHostForExtension(extension->id());
     if (host) {
       InspectExtensionHost(host);
     } else {
       queue->AddPendingTask(
           profile, extension->id(),
           base::Bind(&ExtensionSettingsHandler::InspectExtensionHost,
                      base::Unretained(this)));
     }
 
     return;
@@ skipping 288 matching lines @@
         web_ui()->GetWebContents());
     extension_uninstall_dialog_.reset(
         ExtensionUninstallDialog::Create(browser, this));
   }
   return extension_uninstall_dialog_.get();
 #else
   return NULL;
 #endif  // !defined(OS_ANDROID)
 }
 
-void ExtensionSettingsHandler::InspectExtensionHost(ExtensionHost* host) {
+void ExtensionSettingsHandler::InspectExtensionHost(
+    extensions::ExtensionHost* host) {
   if (host)
     DevToolsWindow::OpenDevToolsWindow(host->render_view_host());
 }