mash: Move most files in //ash/system/tray to //ash/common/system/tray

ash/common/system/tray/fixed_sized_scroll_view.h

 // 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 ASH_SYSTEM_TRAY_FIXED_SIZED_SCROLL_VIEW_H_
-#define ASH_SYSTEM_TRAY_FIXED_SIZED_SCROLL_VIEW_H_
+#ifndef ASH_COMMON_SYSTEM_TRAY_FIXED_SIZED_SCROLL_VIEW_H_
+#define ASH_COMMON_SYSTEM_TRAY_FIXED_SIZED_SCROLL_VIEW_H_
 
-#include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "ui/views/controls/scroll_view.h"
 
 namespace ash {
 
 // A custom scroll-view that has a specified dimension.
 class FixedSizedScrollView : public views::ScrollView {
  public:
   FixedSizedScrollView();
   ~FixedSizedScrollView() override;
@@ skipping 15 matching lines @@
   void OnBoundsChanged(const gfx::Rect& previous_bounds) override;
 
  private:
   gfx::Size fixed_size_;
 
   DISALLOW_COPY_AND_ASSIGN(FixedSizedScrollView);
 };
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_TRAY_FIXED_SIZED_SCROLL_VIEW_H_
+#endif  // ASH_COMMON_SYSTEM_TRAY_FIXED_SIZED_SCROLL_VIEW_H_