Remove some platform specific stuff from views.

ui/app_list/views/folder_background_view.h

Index: ui/app_list/views/folder_background_view.h
diff --git a/ui/app_list/views/folder_background_view.h b/ui/app_list/views/folder_background_view.h
deleted file mode 100644
index dd6c9dd58af5d5a3c98bdbbbb97715525b228622..0000000000000000000000000000000000000000
--- a/ui/app_list/views/folder_background_view.h
+++ /dev/null
@@ -1,54 +0,0 @@
-// 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 UI_APP_LIST_VIEWS_FOLDER_BACKGROUND_VIEW_H_
-#define UI_APP_LIST_VIEWS_FOLDER_BACKGROUND_VIEW_H_
-
-#include "ui/compositor/layer_animation_observer.h"
-#include "ui/views/view.h"
-
-namespace app_list {
-
-class AppListFolderView;
-
-// Draws the ink bubble indicating the boundary of the folder when user drags an
-// item inside a folder.
-class FolderBackgroundView : public views::View,
-                             public ui::ImplicitAnimationObserver {
- public:
-  enum ShowState {
-    NO_BUBBLE,
-    SHOW_BUBBLE,
-    HIDE_BUBBLE,
-  };
-
-  FolderBackgroundView();
-  virtual ~FolderBackgroundView();
-
-  // Updates the ink bubble's ShowState.
-  void UpdateFolderContainerBubble(ShowState state);
-
-  // Returns the radius of the folder container ink bubble.
-  int GetFolderContainerBubbleRadius() const;
-
-  void set_folder_view(AppListFolderView* folder_view) {
-    folder_view_ = folder_view;
-  }
-
- private:
-  // views::View overrides:
-  virtual void OnPaint(gfx::Canvas* canvas) override;
-
-  // ui::ImplicitAnimationObserver overrides:
-  virtual void OnImplicitAnimationsCompleted() override;
-
-  AppListFolderView* folder_view_;
-  ShowState show_state_;
-
-  DISALLOW_COPY_AND_ASSIGN(FolderBackgroundView);
-};
-
-}  // namespace app_list
-
-#endif  // UI_APP_LIST_VIEWS_FOLDER_BACKGROUND_VIEW_H_