Creates BrowserTabStripTracker to consolidate common code

chrome/browser/extensions/api/tabs/tabs_event_router.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 CHROME_BROWSER_EXTENSIONS_API_TABS_TABS_EVENT_ROUTER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_TABS_TABS_EVENT_ROUTER_H_
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/linked_ptr.h"
 #include "base/scoped_observer.h"
 #include "chrome/browser/extensions/api/tabs/tabs_api.h"
 #include "chrome/browser/ui/browser_list_observer.h"
+#include "chrome/browser/ui/browser_tab_strip_tracker.h"
+#include "chrome/browser/ui/browser_tab_strip_tracker_delegate.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "components/favicon/core/favicon_driver_observer.h"
 #include "components/ui/zoom/zoom_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/event_router.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace favicon {
 class FaviconDriver;
 }
 
 namespace extensions {
 
 // The TabsEventRouter listens to tab events and routes them to listeners inside
 // extension process renderers.
 // TabsEventRouter will only route events from windows/tabs within a profile to
 // extension processes in the same profile.
 class TabsEventRouter : public TabStripModelObserver,
+                        public BrowserTabStripTrackerDelegate,
                         public chrome::BrowserListObserver,
                         public content::NotificationObserver,
                         public favicon::FaviconDriverObserver,
                         public ui_zoom::ZoomObserver {
  public:
   explicit TabsEventRouter(Profile* profile);
   ~TabsEventRouter() override;
 
-  // chrome::BrowserListObserver
-  void OnBrowserAdded(Browser* browser) override;
-  void OnBrowserRemoved(Browser* browser) override;
+  // BrowserTabStripTrackerDelegate:
+  bool ShouldTrackBrowser(Browser* browser) override;
+
+  // chrome::BrowserListObserver:
   void OnBrowserSetLastActive(Browser* browser) override;
 
-  // TabStripModelObserver
+  // TabStripModelObserver:
   void TabInsertedAt(content::WebContents* contents,
                      int index,
                      bool active) override;
   void TabClosingAt(TabStripModel* tab_strip_model,
                     content::WebContents* contents,
                     int index) override;
   void TabDetachedAt(content::WebContents* contents, int index) override;
   void ActiveTabChanged(content::WebContents* old_contents,
                         content::WebContents* new_contents,
                         int index,
                         int reason) override;
   void TabSelectionChanged(TabStripModel* tab_strip_model,
                            const ui::ListSelectionModel& old_model) override;
   void TabMoved(content::WebContents* contents,
                 int from_index,
                 int to_index) override;
   void TabChangedAt(content::WebContents* contents,
                     int index,
                     TabChangeType change_type) override;
   void TabReplacedAt(TabStripModel* tab_strip_model,
                      content::WebContents* old_contents,
                      content::WebContents* new_contents,
                      int index) override;
   void TabPinnedStateChanged(content::WebContents* contents,
                              int index) override;
 
-  // content::NotificationObserver.
+  // content::NotificationObserver:
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
-  // ZoomObserver.
+  // ZoomObserver:
   void OnZoomChanged(
       const ui_zoom::ZoomController::ZoomChangedEventData& data) override;
 
-  // favicon::FaviconDriverObserver.
+  // favicon::FaviconDriverObserver:
   void OnFaviconAvailable(const gfx::Image& image) override;
   void OnFaviconUpdated(favicon::FaviconDriver* favicon_driver,
                         bool icon_url_changed) override;
 
  private:
   // "Synthetic" event. Called from TabInsertedAt if new tab is detected.
   void TabCreatedAt(content::WebContents* contents, int index, bool active);
 
   // Internal processing of tab updated events. Is called by both TabChangedAt
   // and Observe/NAV_ENTRY_COMMITTED.
@@ skipping 19 matching lines @@
       scoped_ptr<base::ListValue> event_args,
       scoped_ptr<base::ListValue> cross_incognito_args);
 
   // Packages |changed_properties| as a tab updated event for the tab |contents|
   // and dispatches the event to the extension.
   void DispatchTabUpdatedEvent(
       content::WebContents* contents,
       scoped_ptr<base::DictionaryValue> changed_properties);
 
   // Register ourselves to receive the various notifications we are interested
-  // in for a browser.
-  void RegisterForBrowserNotifications(Browser* browser);
-
-  // Register ourselves to receive the various notifications we are interested
   // in for a tab.
   void RegisterForTabNotifications(content::WebContents* contents);
 
   // Removes notifications added in RegisterForTabNotifications.
   void UnregisterForTabNotifications(content::WebContents* contents);
 
   content::NotificationRegistrar registrar_;
 
   // Maintain some information about known tabs, so we can:
   //
@@ skipping 49 matching lines @@
 
   using TabEntryMap = std::map<int, linked_ptr<TabEntry>>;
   TabEntryMap tab_entries_;
 
   // The main profile that owns this event router.
   Profile* profile_;
 
   ScopedObserver<favicon::FaviconDriver, TabsEventRouter>
       favicon_scoped_observer_;
 
+  BrowserTabStripTracker browser_tab_strip_tracker_;
+
   DISALLOW_COPY_AND_ASSIGN(TabsEventRouter);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_TABS_TABS_EVENT_ROUTER_H_