Switch Extensions::TabHelper to use WebContents, WebContentsUserData.

chrome/browser/extensions/api/extension_action/extension_actions_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_actions_api.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/string_number_conversions.h"
@@ skipping 358 matching lines @@
 }
 
 void ExtensionActionFunction::NotifyBrowserActionChange() {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_BROWSER_ACTION_UPDATED,
       content::Source<ExtensionAction>(extension_action_),
       content::Details<Profile>(profile()));
 }
 
 void ExtensionActionFunction::NotifyLocationBarChange() {
-  contents_->extension_tab_helper()->location_bar_controller()->NotifyChange();
+  extensions::TabHelper::FromWebContents(contents_->web_contents())->
+      location_bar_controller()->NotifyChange();
 }
 
 // static
 bool ExtensionActionFunction::ParseCSSColorString(
     const std::string& color_string,
     SkColor* result) {
   std::string formatted_color = "#";
   // Check the string for incorrect formatting.
   if (color_string[0] != '#')
     return false;
@@ skipping 28 matching lines @@
 
 bool ExtensionActionFunction::SetVisible(bool visible) {
   extension_action_->SetAppearance(
       tab_id_, visible ? ExtensionAction::ACTIVE : ExtensionAction::INVISIBLE);
   NotifyChange();
   return true;
 }
 
 extensions::TabHelper& ExtensionActionFunction::tab_helper() const {
   CHECK(contents_);
-  return *contents_->extension_tab_helper();
+  return *extensions::TabHelper::FromWebContents(contents_->web_contents());
 }
 
 bool ExtensionActionShowFunction::RunExtensionAction() {
   return SetVisible(true);
 }
 
 bool ExtensionActionHideFunction::RunExtensionAction() {
   return SetVisible(false);
 }
 
@@ skipping 114 matching lines @@
 bool ExtensionActionGetBadgeBackgroundColorFunction::RunExtensionAction() {
   ListValue* list = new ListValue();
   SkColor color = extension_action_->GetBadgeBackgroundColor(tab_id_);
   list->Append(Value::CreateIntegerValue(SkColorGetR(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetG(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetB(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetA(color)));
   SetResult(list);
   return true;
 }