Introduce webNavigation.onTabReplaced event that is fired when a tab from instant or prerender repl…

chrome/browser/extensions/api/web_navigation/web_navigation_api.h

 // 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.
 
 // Defines the Chrome Extensions WebNavigation API functions for observing and
 // intercepting navigation events, as specified in the extension JSON API.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_WEB_NAVIGATION_WEB_NAVIGATION_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_WEB_NAVIGATION_WEB_NAVIGATION_API_H_
 #pragma once
 
 #include <map>
 #include <set>
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "googleurl/src/gurl.h"
 
 struct RetargetingDetails;
 
 namespace extensions {
 
 // Tracks the navigation state of all frames in a given tab currently known to
@@ skipping 158 matching lines @@
   FrameNavigationState navigation_state_;
 
   // Used for tracking registrations to redirect notifications.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(WebNavigationTabObserver);
 };
 
 // Observes navigation notifications and routes them as events to the extension
 // system.
-class WebNavigationEventRouter : public content::NotificationObserver {
+class WebNavigationEventRouter : public TabStripModelObserver,
+                                 public BrowserList::Observer,
+                                 public content::NotificationObserver {
  public:
   explicit WebNavigationEventRouter(Profile* profile);
   virtual ~WebNavigationEventRouter();
 
   // Invoked by the extensions service once the extension system is fully set
   // up and can start dispatching events to extensions.
   void Init();
 
  private:
   // Used to cache the information about newly created WebContents objects.
   struct PendingWebContents{
     PendingWebContents();
     PendingWebContents(content::WebContents* source_web_contents,
                        int64 source_frame_id,
                        bool source_frame_is_main_frame,
                        content::WebContents* target_web_contents,
                        const GURL& target_url);
     ~PendingWebContents();
 
     content::WebContents* source_web_contents;
     int64 source_frame_id;
     bool source_frame_is_main_frame;
     content::WebContents* target_web_contents;
     GURL target_url;
   };
 
+  // TabStripModelObserver implementation.
+  virtual void TabReplacedAt(TabStripModel* tab_strip_model,
+                             TabContents* old_contents,
+                             TabContents* new_contents,
+                             int index) OVERRIDE;
+
+  // BrowserList::Observer implementation.
+  virtual void OnBrowserAdded(Browser* browser) OVERRIDE;
+  virtual void OnBrowserRemoved(Browser* browser) OVERRIDE;
+
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Handler for the NOTIFICATION_RETARGETING event. The method takes the
   // details of such an event and stores them for the later
   // NOTIFICATION_TAB_ADDED event.
   void Retargeting(const RetargetingDetails* details);
 
@@ skipping 28 matching lines @@
 // API function that returns the states of all frames in a given tab.
 class GetAllFramesFunction : public SyncExtensionFunction {
   virtual ~GetAllFramesFunction() {}
   virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("webNavigation.getAllFrames")
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_WEB_NAVIGATION_WEB_NAVIGATION_API_H_