[Extensions] Add logic for when to show the toolbar redesign bubble.

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/macros.h"
 #include "base/memory/scoped_vector.h"
 #include "base/scoped_observer.h"
@@ skipping 152 matching lines @@
   void OnToolbarExtensionUpdated(
       const extensions::Extension* extension) override;
   bool ShowExtensionActionPopup(const extensions::Extension* extension,
                                 bool grant_active_tab) override;
   void OnToolbarVisibleCountChanged() override;
   void OnToolbarHighlightModeChanged(bool is_highlighting) override;
   void OnToolbarModelInitialized() override;
   Browser* GetBrowser() override;
 
   // ToolbarActionsBarBubbleDelegate:
+  void OnToolbarActionsBarBubbleShown() override;
   void OnToolbarActionsBarBubbleClosed(CloseAction action) override;
 
   // Resizes the delegate (if necessary) to the preferred size using the given
   // |tween_type| and optionally suppressing the chevron.
   void ResizeDelegate(gfx::Tween::Type tween_type, bool suppress_chevron);
 
   // Returns the action for the given |id|, if one exists.
   ToolbarActionViewController* GetActionForId(const std::string& id);
 
   // Returns the current web contents.
@@ skipping 53 matching lines @@
   // alter.
   static bool send_overflowed_action_changes_;
 
   // True if an action in the overflow menu wants to run.
   bool overflowed_action_wants_to_run_;
 
   DISALLOW_COPY_AND_ASSIGN(ToolbarActionsBar);
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_ACTIONS_BAR_H_