Revert 116894 - Factor more colors into NativeTheme.

ui/gfx/native_theme_chromeos.h

Index: ui/gfx/native_theme_chromeos.h
===================================================================
--- ui/gfx/native_theme_chromeos.h	(revision 116905)
+++ ui/gfx/native_theme_chromeos.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -25,9 +25,8 @@
   virtual gfx::Size GetPartSize(Part part,
                                 State state,
                                 const ExtraParams& extra) const OVERRIDE;
-  virtual SkColor GetSystemColor(ColorId color_id) const OVERRIDE;
 
-  // NativeThemeBase overrides
+  // NativeThemeLinux overrides
   virtual void PaintScrollbarTrack(SkCanvas* canvas,
       Part part, State state,
       const ScrollbarTrackExtraParams& extra_params,