[Extensions UI] Convert ExtensionMessageBubbles to ToolbarActionsBarBubbles

chrome/browser/ui/toolbar/test_toolbar_actions_bar_bubble_delegate.cc

 // 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.
 
 #include "chrome/browser/ui/toolbar/test_toolbar_actions_bar_bubble_delegate.h"
 
 #include "base/logging.h"
 #include "base/macros.h"
 
 class TestToolbarActionsBarBubbleDelegate::DelegateImpl
@@ skipping 20 matching lines @@
   }
   std::string GetAnchorActionId() override { return std::string(); }
   void OnBubbleShown() override {
     CHECK(!parent_->shown_);
     parent_->shown_ = true;
   }
   void OnBubbleClosed(CloseAction action) override {
     CHECK(!parent_->close_action_);
     parent_->close_action_.reset(new CloseAction(action));
   }
-  bool IsExtensionMessageBubble() override { return false; }
 
   TestToolbarActionsBarBubbleDelegate* parent_;
 
   DISALLOW_COPY_AND_ASSIGN(DelegateImpl);
 };
 
 TestToolbarActionsBarBubbleDelegate::TestToolbarActionsBarBubbleDelegate(
     const base::string16& heading,
     const base::string16& body,
     const base::string16& action)
     : shown_(false),
       heading_(heading),
       body_(body),
       action_(action),
       close_on_deactivate_(true) {
 }
 
 TestToolbarActionsBarBubbleDelegate::~TestToolbarActionsBarBubbleDelegate() {
   // If the bubble didn't close, it means that it still owns the DelegateImpl,
   // which has a weak ptr to this object. Make sure that this class always
   // outlives the bubble.
   CHECK(close_action_);
 }
 
 std::unique_ptr<ToolbarActionsBarBubbleDelegate>
 TestToolbarActionsBarBubbleDelegate::GetDelegate() {
   return std::unique_ptr<ToolbarActionsBarBubbleDelegate>(
       new DelegateImpl(this));
 }