[ash-md] Updated the overflow shelf to change colors based on the wallpaper.

ash/shelf/shelf_background_animator_unittest.cc

 // Copyright 2016 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/shelf/shelf_background_animator.h"
 
 #include <memory>
 
 #include "ash/animation/animation_change_type.h"
 #include "ash/shelf/shelf_background_animator_observer.h"
 #include "ash/shelf/shelf_constants.h"
-#include "ash/wallpaper/wallpaper_controller.h"
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/test/test_mock_time_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/animation/slide_animation.h"
 
 namespace ash {
 namespace {
 
@@ skipping 259 matching lines @@
        ObserversAreNotifiedWhenSnappingToSameTargetBackground) {
   PaintBackground(SHELF_BACKGROUND_DEFAULT);
   SetColorValuesOnObserver(kDummyColor);
   PaintBackground(SHELF_BACKGROUND_DEFAULT);
 
   EXPECT_NE(observer_.background_color(), kDummyColor);
   EXPECT_NE(observer_.item_background_color(), kDummyColor);
 }
 
 }  // namespace ash