[Extensions Toolbar] Fix action pop out bug and views animation

chrome/browser/ui/toolbar/toolbar_actions_bar.h

 // Copyright 2014 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_UI_TOOLBAR_TOOLBAR_ACTIONS_BAR_H_
 #define CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_ACTIONS_BAR_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
+#include "base/observer_list.h"
 #include "base/scoped_observer.h"
 #include "chrome/browser/ui/toolbar/toolbar_actions_bar_bubble_delegate.h"
 #include "chrome/browser/ui/toolbar/toolbar_actions_model.h"
 #include "ui/gfx/animation/tween.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace extensions {
 class Extension;
 class ExtensionMessageBubbleController;
 }
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 class ToolbarActionsBarDelegate;
+class ToolbarActionsBarObserver;
 class ToolbarActionViewController;
 
 // A platform-independent version of the container for toolbar actions,
 // including extension actions and component actions.
 //
 // This is a per-window instance, unlike the ToolbarActionsModel, which is
 // per-profile. In most cases, ordering and visible count will be identical
 // between the base model and the window; however, there are exceptions in the
 // case of very small windows (which may be too narrow to display all the
 // icons), or windows in which an action is "popped out", resulting in a
@@ skipping 157 matching lines @@
   // Sets the active popup owner to be |popup_owner|.
   void SetPopupOwner(ToolbarActionViewController* popup_owner);
 
   // Hides the actively showing popup, if any.
   void HideActivePopup();
 
   // Returns the main (i.e., not overflow) controller for the given action.
   ToolbarActionViewController* GetMainControllerForAction(
       ToolbarActionViewController* action);
 
+  // Add or remove an observer.
+  void AddObserver(ToolbarActionsBarObserver* observer);
+  void RemoveObserver(ToolbarActionsBarObserver* observer);
+
   // Returns the underlying toolbar actions, but does not order them. Primarily
   // for use in testing.
   const std::vector<ToolbarActionViewController*>& toolbar_actions_unordered()
       const {
     return toolbar_actions_.get();
   }
   bool enabled() const { return model_ != nullptr; }
   bool suppress_layout() const { return suppress_layout_; }
   bool suppress_animation() const {
     return suppress_animation_ || disable_animations_for_testing_;
@@ skipping 101 matching lines @@
   ToolbarActionViewController* popped_out_action_;
 
   // The task to alert the |popped_out_action_| that animation has finished, and
   // it is fully popped out.
   base::Closure popped_out_closure_;
 
   // The controller of the bubble to show once animation finishes, if any.
   scoped_ptr<extensions::ExtensionMessageBubbleController>
       pending_extension_bubble_controller_;
 
+  base::ObserverList<ToolbarActionsBarObserver> observers_;
+
   base::WeakPtrFactory<ToolbarActionsBar> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ToolbarActionsBar);
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_ACTIONS_BAR_H_