cleanup: Remove dead code in launcher_view.

ash/test/launcher_view_test_api.cc

 // Copyright (c) 2012 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 "ash/test/launcher_view_test_api.h"
 
 #include "ash/launcher/launcher_button.h"
 #include "ash/launcher/launcher_view.h"
 #include "ash/launcher/overflow_button.h"
 #include "base/message_loop.h"
 #include "ui/views/animation/bounds_animator.h"
-#include "ui/views/controls/button/image_button.h"
 #include "ui/views/view_model.h"
 
 namespace {
 
 // A class used to wait for animations.
 class TestAPIAnimationObserver : public views::BoundsAnimatorObserver {
  public:
   TestAPIAnimationObserver() {}
   virtual ~TestAPIAnimationObserver() {}
 
@@ skipping 62 matching lines @@
 
   // This nested loop will quit when TestAPIAnimationObserver's
   // OnBoundsAnimatorDone is called.
   MessageLoop::current()->Run();
 
   launcher_view_->bounds_animator_->RemoveObserver(observer.get());
 }
 
 }  // namespace test
 }  // namespace ash