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

ui/gfx/switches.cc

+// 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.
+
+#include "ui/gfx/switches.h"
+
+namespace gfx {
+namespace switches {
+
+// Whether or not ImageSkiaOperations methods can scale one of images
+// if they don't have the same scale factor.
+const char kDisableScalingInImageSkiaOperations[] =
+    "disable-scaling-in-image-skia-operations";
+
+// Let text glyphs have X-positions that aren't snapped to the pixel grid in
+// the browser UI.
+const char kEnableBrowserTextSubpixelPositioning[] =
+    "enable-browser-text-subpixel-positioning";
+
+// Enable text glyphs to have X-positions that aren't snapped to the pixel grid
+// in webkit renderers.
+const char kEnableWebkitTextSubpixelPositioning[] =
+    "enable-webkit-text-subpixel-positioning";
+
+}  // namespace switches
+}  // namespace gfx