ui/gfx: Create a new gfx switches file to put gfx specific switches there.

ui/gfx/switches.h

+// 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 "ui/base/ui_export.h"
+
+namespace gfx {
+namespace switches {
+
+UI_EXPORT extern const char kDisableScalingInImageSkiaOperations[];
+UI_EXPORT extern const char kEnableBrowserTextSubpixelPositioning[];
+UI_EXPORT extern const char kEnableWebkitTextSubpixelPositioning[];
+
+}  // namespace switches
+}  // namespace gfx
+
+#endif  // UI_GFX_SWITCHES_H_