Add DirectWrite flag and plumb it through to Blink

content/public/common/content_switches.cc

 // Copyright (c) 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 "content/public/common/content_switches.h"
 
 namespace switches {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
 // have an effect. 0 disables MSAA.
@@ skipping 440 matching lines @@
 const char kEnableGpuBenchmarking[]         = "enable-gpu-benchmarking";
 
 // Enables TRACE for GL calls in the renderer.
 const char kEnableGpuClientTracing[]        = "enable-gpu-client-tracing";
 
 // See comment for kEnableCompositingForFixedPosition.
 const char kEnableHighDpiCompositingForFixedPosition[] =
      "enable-high-dpi-fixed-position-compositing";
 
 #if defined(OS_WIN)
+// Enables the DirectWrite font rendering system on windows.
+const char kEnableDirectWrite[]             = "enable-direct-write";
+
 // Use high resolution timers for TimeTicks.
 const char kEnableHighResolutionTime[]      = "enable-high-resolution-time";
 #endif
 
 // Enable HTML Imports
 extern const char kEnableHTMLImports[]      = "enable-html-imports";
 
 // Enables support for inband text tracks in media content.
 const char kEnableInbandTextTracks[]        = "enable-inband-text-tracks";
 
@@ skipping 560 matching lines @@
 #endif
 
 #if defined(OS_POSIX)
 // Causes the child processes to cleanly exit via calling exit().
 const char kChildCleanExit[]                = "child-clean-exit";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches