Introduce ActiveScriptController; track active extension scripts

chrome/browser/extensions/api/extension_action/extension_action_api.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/api/extension_action/extension_action_api.h"
 
 #include "base/base64.h"
 #include "base/lazy_instance.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ skipping 614 matching lines @@
 }
 
 void ExtensionActionFunction::NotifyBrowserActionChange() {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_BROWSER_ACTION_UPDATED,
       content::Source<ExtensionAction>(extension_action_),
       content::Details<Profile>(GetProfile()));
 }
 
 void ExtensionActionFunction::NotifyLocationBarChange() {
-  TabHelper::FromWebContents(contents_)->
-      location_bar_controller()->NotifyChange();
+  LocationBarController::NotifyChange(contents_);
 }
 
 void ExtensionActionFunction::NotifySystemIndicatorChange() {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_SYSTEM_INDICATOR_UPDATED,
       content::Source<Profile>(GetProfile()),
       content::Details<ExtensionAction>(extension_action_));
 }
 
 bool ExtensionActionFunction::SetVisible(bool visible) {
@@ skipping 255 matching lines @@
   content::NavigationEntry* entry = contents->GetController().GetVisibleEntry();
   if (!entry || url != entry->GetURL().spec()) {
     error_ = extensions::ErrorUtils::FormatErrorMessage(
         extensions::kUrlNotActiveError, url);
     return false;
   }
 
   // Set visibility and broadcast notifications that the UI should be updated.
   page_action->SetIsVisible(tab_id, enable);
   page_action->SetTitle(tab_id, title);
-  extensions::TabHelper::FromWebContents(contents)->
-      location_bar_controller()->NotifyChange();
+  extensions::LocationBarController::NotifyChange(contents);
 
   return true;
 }
 
 bool EnablePageActionsFunction::RunSync() {
   return SetPageActionEnabled(true);
 }
 
 bool DisablePageActionsFunction::RunSync() {
   return SetPageActionEnabled(false);
 }