Move SessionID, CaptureVisibleTabFunction to WebContents.

chrome/browser/extensions/page_action_controller.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/page_action_controller.h"
 
 #include "chrome/browser/extensions/browser_event_router.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/tab_helper.h"
@@ skipping 76 matching lines @@
     const content::LoadCommittedDetails& details,
     const content::FrameNavigateParams& params) {
   if (details.is_in_page)
     return;
 
   const std::vector<ExtensionAction*> current_actions = GetCurrentActions();
 
   if (current_actions.empty())
     return;
 
-  TabContents* tab_contents = TabContents::FromWebContents(web_contents());
   for (size_t i = 0; i < current_actions.size(); ++i) {
     current_actions[i]->ClearAllValuesForTab(
-        SessionID::IdForTab(tab_contents));
+        SessionID::IdForTab(web_contents()));
   }
 
   NotifyChange();
 }
 
 ExtensionService* PageActionController::GetExtensionService() const {
   TabContents* tab_contents = TabContents::FromWebContents(web_contents());
   return ExtensionSystem::Get(tab_contents->profile())->extension_service();
 }
 
 }  // namespace extensions