Remove some unused ui/gfx code.

ui/gfx/switches.h

Index: ui/gfx/switches.h
diff --git a/ui/gfx/switches.h b/ui/gfx/switches.h
deleted file mode 100644
index e85dabfc474d5b85c8263dec0637488ea1d2779a..0000000000000000000000000000000000000000
--- a/ui/gfx/switches.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 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_GFX_SWITCHES_H_
-#define UI_GFX_SWITCHES_H_
-
-#include "build/build_config.h"
-#include "ui/gfx/gfx_export.h"
-
-namespace switches {
-
-GFX_EXPORT extern const char kAllowArbitraryScaleFactorInImageSkia[];
-GFX_EXPORT extern const char kDisableHarfBuzzRenderText[];
-GFX_EXPORT extern const char kEnableHarfBuzzRenderText[];
-GFX_EXPORT extern const char kEnableWebkitTextSubpixelPositioning[];
-GFX_EXPORT extern const char kForceDeviceScaleFactor[];
-
-#if defined(OS_WIN)
-GFX_EXPORT extern const char kDisableDirectWrite[];
-GFX_EXPORT extern const char kEnableDirectWriteForUI[];
-#endif
-
-}  // namespace switches
-
-#endif  // UI_GFX_SWITCHES_H_