[Win] Add a fast profile switcher to the Windows taskbar item.

chrome/browser/jumplist_win.h

Index: chrome/browser/jumplist_win.h
diff --git a/chrome/browser/jumplist_win.h b/chrome/browser/jumplist_win.h
index 854ab6b6b4c3fbb872ec3d8dd2663016ae76a2ad..0f9a7fb8c8545dd67d5bd71ec0d1ccc8431f45b4 100644
--- a/chrome/browser/jumplist_win.h
+++ b/chrome/browser/jumplist_win.h
@@ -17,6 +17,8 @@
 #include "chrome/browser/history/history_service.h"
 #include "chrome/browser/jumplist_updater_win.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
+#include "chrome/browser/profiles/avatar_menu.h"
+#include "chrome/browser/profiles/avatar_menu_observer.h"
 #include "chrome/browser/sessions/tab_restore_service.h"
 #include "chrome/browser/sessions/tab_restore_service_observer.h"
 #include "components/history/core/browser/history_types.h"
@@ -53,23 +55,27 @@ class Profile;
 // always delete JumpList on UI thread (the same thread it got constructed on).
 class JumpList : public TabRestoreServiceObserver,
                  public content::NotificationObserver,
+                 public AvatarMenuObserver,
                  public base::RefCountedThreadSafe<
                      JumpList, content::BrowserThread::DeleteOnUIThread> {
  public:
   explicit JumpList(Profile* profile);
 
   // NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details);
+  void Observe(int type,
+               const content::NotificationSource& source,
+               const content::NotificationDetails& details) override;
 
   // Observer callback for TabRestoreService::Observer to notify when a tab is
   // added or removed.
-  virtual void TabRestoreServiceChanged(TabRestoreService* service);
+  void TabRestoreServiceChanged(TabRestoreService* service) override;
 
   // Observer callback to notice when our associated TabRestoreService
   // is destroyed.
-  virtual void TabRestoreServiceDestroyed(TabRestoreService* service);
+  void TabRestoreServiceDestroyed(TabRestoreService* service) override;
+
+  // Overridden from AvatarMenuObserver:
+  void OnAvatarMenuChanged(AvatarMenu* avatar_menu) override;
 
   // Cancel a pending jumplist update.
   void CancelPendingUpdate();
@@ -128,12 +134,17 @@ class JumpList : public TabRestoreServiceObserver,
 
   // Runnable method that updates the jumplist, once all the data
   // has been fetched.
-  void RunUpdate(IncognitoModePrefs::Availability incognito_availability);
+  void RunUpdateOnFileThread(
+      IncognitoModePrefs::Availability incognito_availability);
 
   // Helper method for RunUpdate to create icon files for the asynchrounously
   // loaded icons.
   void CreateIconFiles(const ShellLinkItemList& item_list);
 
+  // Called when the list of Profiles has changed. This function updates the
+  // |profile_switcher_| ShellLinkItemList.
+  void UpdateProfileSwitcher();
+
   // Tracks FaviconService tasks.
   base::CancelableTaskTracker cancelable_task_tracker_;
 
@@ -158,6 +169,10 @@ class JumpList : public TabRestoreServiceObserver,
   // protected by the list_lock_.
   ShellLinkItemList recently_closed_pages_;
 
+  // Items in the "People" category of the application JumpList, protected
+  // by the list_lock_.
+  ShellLinkItemList profile_switcher_;
+
   // A list of URLs we need to retrieve their favicons,
   // protected by the list_lock_.
   typedef std::pair<std::string, scoped_refptr<ShellLinkItem> > URLPair;
@@ -174,6 +189,13 @@ class JumpList : public TabRestoreServiceObserver,
   // For callbacks may be run after destruction.
   base::WeakPtrFactory<JumpList> weak_ptr_factory_;
 
+  // Contains data about existing Profiles.
+  scoped_ptr<AvatarMenu> avatar_menu_;
+
+  // Whether the experiment that is replacing "Most Visited" category with a
+  // "People" category is enabled.
+  bool use_profiles_category_;
+
   DISALLOW_COPY_AND_ASSIGN(JumpList);
 };