Remove some platform specific stuff from views.

ui/app_list/search_box_model_observer.h

Index: ui/app_list/search_box_model_observer.h
diff --git a/ui/app_list/search_box_model_observer.h b/ui/app_list/search_box_model_observer.h
deleted file mode 100644
index a903dbc03cfedbd4735dea5164e22c56a3f92b2d..0000000000000000000000000000000000000000
--- a/ui/app_list/search_box_model_observer.h
+++ /dev/null
@@ -1,36 +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_SEARCH_BOX_MODEL_OBSERVER_H_
-#define UI_APP_LIST_SEARCH_BOX_MODEL_OBSERVER_H_
-
-#include "ui/app_list/app_list_export.h"
-
-namespace app_list {
-
-class APP_LIST_EXPORT SearchBoxModelObserver {
- public:
-  // Invoked when icon is changed.
-  virtual void IconChanged() = 0;
-
-  // Invoked when the some properties of the speech recognition button is
-  // changed.
-  virtual void SpeechRecognitionButtonPropChanged() = 0;
-
-  // Invoked when hint text is changed.
-  virtual void HintTextChanged() = 0;
-
-  // Invoked when selection model is changed.
-  virtual void SelectionModelChanged() = 0;
-
-  // Invoked when text is changed.
-  virtual void TextChanged() = 0;
-
- protected:
-  virtual ~SearchBoxModelObserver() {}
-};
-
-}  // namespace app_list
-
-#endif  // UI_APP_LIST_SEARCH_BOX_MODEL_OBSERVER_H_