app_shell: Fix PrefsTabHelper dependency of ExtensionHost

chrome/browser/extensions/extension_host.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/extensions/extension_host.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/error_console/error_console.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/extensions/extension_web_contents_observer.h"
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
-#include "chrome/browser/ui/prefs/prefs_tab_helper.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_messages.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
@@ skipping 100 matching lines @@
          host_type == VIEW_TYPE_EXTENSION_DIALOG ||
          host_type == VIEW_TYPE_EXTENSION_INFOBAR ||
          host_type == VIEW_TYPE_EXTENSION_POPUP);
   host_contents_.reset(WebContents::Create(
       WebContents::CreateParams(browser_context_, site_instance))),
   content::WebContentsObserver::Observe(host_contents_.get());
   host_contents_->SetDelegate(this);
   SetViewType(host_contents_.get(), host_type);
 
   ExtensionWebContentsObserver::CreateForWebContents(host_contents());
-  PrefsTabHelper::CreateForWebContents(host_contents());
 
   render_view_host_ = host_contents_->GetRenderViewHost();
 
   // Listen for when an extension is unloaded from the same profile, as it may
   // be the same extension that this points to.
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
                  content::Source<BrowserContext>(browser_context_));
+
+  ExtensionsBrowserClient::Get()->OnExtensionHostCreated(host_contents());
 }
 
 ExtensionHost::~ExtensionHost() {
   if (extension_host_type_ == VIEW_TYPE_EXTENSION_BACKGROUND_PAGE &&
       extension_ && BackgroundInfo::HasLazyBackgroundPage(extension_)) {
     UMA_HISTOGRAM_LONG_TIMES("Extensions.EventPageActiveTime",
                              since_created_.Elapsed());
   }
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_HOST_DESTROYED,
@@ skipping 294 matching lines @@
 
 void ExtensionHost::RequestMediaAccessPermission(
     content::WebContents* web_contents,
     const content::MediaStreamRequest& request,
     const content::MediaResponseCallback& callback) {
   MediaCaptureDevicesDispatcher::GetInstance()->ProcessMediaAccessRequest(
       web_contents, request, callback, extension());
 }
 
 }  // namespace extensions