[Extensions] Fix improper extension tab ownership bug

extensions/renderer/extension_frame_helper.h

 // 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.
 
 #ifndef EXTENSIONS_RENDERER_EXTENSION_FRAME_HELPER_H_
 #define EXTENSIONS_RENDERER_EXTENSION_FRAME_HELPER_H_
 
 #include <vector>
 
 #include "content/public/common/console_message_level.h"
@@ skipping 38 matching lines @@
 
   // Returns true if the given |context| is for any frame in the extension's
   // event page.
   // TODO(devlin): This isn't really used properly, and should probably be
   // deleted.
   static bool IsContextForEventPage(const ScriptContext* context);
 
   ViewType view_type() const { return view_type_; }
   int tab_id() const { return tab_id_; }
   int browser_window_id() const { return browser_window_id_; }
-  const std::string& tab_extension_owner_id() const {
-    return tab_extension_owner_id_;
-  }
 
  private:
   // RenderFrameObserver implementation.
   void DidCreateDocumentElement() override;
   void DidMatchCSS(
       const blink::WebVector<blink::WebString>& newly_matching_selectors,
       const blink::WebVector<blink::WebString>& stopped_matching_selectors)
           override;
   void DidCreateScriptContext(v8::Local<v8::Context>,
                               int extension_group,
                               int world_id) override;
   void WillReleaseScriptContext(v8::Local<v8::Context>, int world_id) override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
   // IPC handlers.
   void OnExtensionDispatchOnConnect(
       int target_port_id,
       const std::string& channel_name,
       const ExtensionMsg_TabConnectionInfo& source,
       const ExtensionMsg_ExternalConnectionInfo& info,
       const std::string& tls_channel_id);
   void OnExtensionDeliverMessage(int target_port_id,
                                  const Message& message);
   void OnExtensionDispatchOnDisconnect(int port_id,
                                        const std::string& error_message);
   void OnExtensionSetTabId(int tab_id);
-  void OnSetMainFrameExtensionOwner(const std::string& extension_id);
   void OnUpdateBrowserWindowId(int browser_window_id);
   void OnNotifyRendererViewType(ViewType view_type);
   void OnExtensionResponse(int request_id,
                            bool success,
                            const base::ListValue& response,
                            const std::string& error);
   void OnExtensionMessageInvoke(const std::string& extension_id,
                                 const std::string& module_name,
                                 const std::string& function_name,
                                 const base::ListValue& args,
                                 bool user_gesture);
 
   // Type of view associated with the RenderFrame.
   ViewType view_type_;
 
   // The id of the tab the render frame is attached to.
   int tab_id_;
 
   // The id of the browser window the render frame is attached to.
   int browser_window_id_;
 
-  // The id of the extension that "owns" the tab if this is a chrome-extension
-  // page. If it's not a chrome-extension page, |tab_extension_owner_id_| is
-  // empty.
-  std::string tab_extension_owner_id_;
-
   Dispatcher* extension_dispatcher_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionFrameHelper);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_EXTENSION_FRAME_HELPER_H_