app_shell: Fix PrefsTabHelper dependency of ExtensionHost

chrome/browser/extensions/chrome_extensions_browser_client.cc

 // Copyright 2013 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_extensions_browser_client.h"
 
 #include "base/command_line.h"
 #include "base/version.h"
 #include "chrome/browser/app_mode/app_mode_utils.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/chrome_app_sorting.h"
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/app_modal_dialogs/javascript_dialog_manager.h"
 #include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/prefs/prefs_tab_helper.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/pref_names.h"
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/chromeos_switches.h"
 #endif
 
 namespace extensions {
 
@@ skipping 74 matching lines @@
   // background page shouldn't be created in it.
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(chromeos::switches::kGuestSession) &&
       !context->IsOffTheRecord()) {
     return false;
   }
 #endif
   return true;
 }
 
+void ChromeExtensionsBrowserClient::OnExtensionHostCreated(
+    content::WebContents* web_contents) {
+  PrefsTabHelper::CreateForWebContents(web_contents);
+}
+
 bool ChromeExtensionsBrowserClient::DidVersionUpdate(
     content::BrowserContext* context) {
   Profile* profile = static_cast<Profile*>(context);
 
   // Unit tests may not provide prefs; assume everything is up-to-date.
   ExtensionPrefs* extension_prefs = ExtensionPrefs::Get(profile);
   if (!extension_prefs)
     return false;
 
   // If we're inside a browser test, then assume prefs are all up-to-date.
@@ skipping 27 matching lines @@
 bool ChromeExtensionsBrowserClient::IsRunningInForcedAppMode() {
   return chrome::IsRunningInForcedAppMode();
 }
 
 content::JavaScriptDialogManager*
 ChromeExtensionsBrowserClient::GetJavaScriptDialogManager() {
   return GetJavaScriptDialogManagerInstance();
 }
 
 }  // namespace extensions