Remove some unused ui/gfx code.

ui/gfx/switches.cc

Index: ui/gfx/switches.cc
diff --git a/ui/gfx/switches.cc b/ui/gfx/switches.cc
deleted file mode 100644
index 90813d079a6417769bcf6224e729665e2557e7e6..0000000000000000000000000000000000000000
--- a/ui/gfx/switches.cc
+++ /dev/null
@@ -1,31 +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.
-
-#include "ui/gfx/switches.h"
-
-namespace switches {
-
-// Disables the HarfBuzz port of RenderText on all platforms.
-const char kDisableHarfBuzzRenderText[] = "disable-harfbuzz-rendertext";
-
-// Enables the HarfBuzz port of RenderText on all platforms.
-const char kEnableHarfBuzzRenderText[] = "enable-harfbuzz-rendertext";
-
-// 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";
-
-// Overrides the device scale factor for the browser UI and the contents.
-const char kForceDeviceScaleFactor[] = "force-device-scale-factor";
-
-#if defined(OS_WIN)
-// Disables the DirectWrite font rendering system on windows.
-const char kDisableDirectWrite[] = "disable-direct-write";
-
-// Enables DirectWrite font rendering for general UI elements.
-const char kEnableDirectWriteForUI[] = "enable-directwrite-for-ui";
-#endif
-
-}  // namespace switches