Remove some platform specific stuff from views.

ui/app_list/app_list_item_observer.h

Index: ui/app_list/app_list_item_observer.h
diff --git a/ui/app_list/app_list_item_observer.h b/ui/app_list/app_list_item_observer.h
deleted file mode 100644
index e74e127684de91da61d18dd598fd49f74db97660..0000000000000000000000000000000000000000
--- a/ui/app_list/app_list_item_observer.h
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2013 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_APP_LIST_ITEM_OBSERVER_H_
-#define UI_APP_LIST_APP_LIST_ITEM_OBSERVER_H_
-
-#include "ui/app_list/app_list_export.h"
-
-namespace app_list {
-
-class APP_LIST_EXPORT AppListItemObserver {
- public:
-  // Invoked after item's icon is changed.
-  virtual void ItemIconChanged() {}
-
-  // Invoked after item's name is changed.
-  virtual void ItemNameChanged() {}
-
-  // Invoked after item begins or finishes installing.
-  virtual void ItemIsInstallingChanged() {}
-
-  // Invoked after item's download percentage changes.
-  virtual void ItemPercentDownloadedChanged() {}
-
-  // Invoked when the item is about to be destroyed.
-  virtual void ItemBeingDestroyed() {}
-
- protected:
-  virtual ~AppListItemObserver() {}
-};
-
-}  // namespace app_list
-
-#endif  // UI_APP_LIST_APP_LIST_ITEM_OBSERVER_H_