Remove some platform specific stuff from views.

ui/app_list/app_list_model_observer.h

Index: ui/app_list/app_list_model_observer.h
diff --git a/ui/app_list/app_list_model_observer.h b/ui/app_list/app_list_model_observer.h
deleted file mode 100644
index 25275018a201dae2f4d3b4bbfeb9863ba661d8d9..0000000000000000000000000000000000000000
--- a/ui/app_list/app_list_model_observer.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// 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.
-
-#ifndef UI_APP_LIST_APP_LIST_MODEL_OBSERVER_H_
-#define UI_APP_LIST_APP_LIST_MODEL_OBSERVER_H_
-
-#include "ui/app_list/app_list_export.h"
-
-namespace app_list {
-
-class AppListItem;
-
-class APP_LIST_EXPORT AppListModelObserver {
- public:
-  // Invoked when AppListModel's status has changed.
-  virtual void OnAppListModelStatusChanged() {}
-
-  // Triggered after |item| has been added to the model.
-  virtual void OnAppListItemAdded(AppListItem* item) {}
-
-  // Triggered just before an item is deleted from the model.
-  virtual void OnAppListItemWillBeDeleted(AppListItem* item) {}
-
-  // Triggered just after an item is deleted from the model.
-  virtual void OnAppListItemDeleted() {}
-
-  // Triggered after |item| has moved, changed folders, or changed properties.
-  virtual void OnAppListItemUpdated(AppListItem* item) {}
-
- protected:
-  virtual ~AppListModelObserver() {}
-};
-
-}  // namespace app_list
-
-#endif  // UI_APP_LIST_APP_LIST_MODEL_OBSERVER_H_