[Extensions UI] Convert ExtensionMessageBubbles to ToolbarActionsBarBubbles

chrome/browser/ui/toolbar/toolbar_actions_bar_bubble_delegate.h

 // Copyright 2015 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_BUBBLE_DELEGATE_H_
 #define CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_ACTIONS_BAR_BUBBLE_DELEGATE_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
@@ skipping 46 matching lines @@
 
   // Returns the id of the action to point to, or the empty string if the
   // bubble should point to the center of the actions container.
   virtual std::string GetAnchorActionId() = 0;
 
   // Called when the bubble is shown.
   virtual void OnBubbleShown() = 0;
 
   // Called when the bubble is closed with the type of action the user took.
   virtual void OnBubbleClosed(CloseAction action) = 0;
-
-  // Returns true if this is for an ExtensionMessageBubbleController.
-  // TODO(devlin): We shouldn't need this.
-  virtual bool IsExtensionMessageBubble() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_ACTIONS_BAR_BUBBLE_DELEGATE_H_