Move the ShouldUseDirectWrite function from sandbox_win.cc/.h to ui/gfx/win/dpi.cc/.h.

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 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";
+#endif
+
 }  // namespace switches