Support DirectWrite with sandbox on

content/browser/renderer_host/render_process_host_impl.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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 746 matching lines @@
       storage_partition_impl_->GetFileSystemContext(),
       ChromeBlobStorageContext::GetFor(browser_context),
       StreamContext::GetFor(browser_context)));
   AddFilter(new FileUtilitiesMessageFilter(GetID()));
   AddFilter(new MimeRegistryMessageFilter());
   AddFilter(new DatabaseMessageFilter(
       storage_partition_impl_->GetDatabaseTracker()));
 #if defined(OS_MACOSX)
   AddFilter(new TextInputClientMessageFilter(GetID()));
 #elif defined(OS_WIN)
-  channel_->AddFilter(new FontCacheDispatcher());
+  // The FontCacheDispatcher is required only when we're using GDI rendering.
+  if (!content::ShouldUseDirectWrite())

[jam, 2014/03/25 22:57:26]

nit: no "content::"

[scottmg, 2014/03/25 23:38:18]

Done.

+    channel_->AddFilter(new FontCacheDispatcher());
 #elif defined(OS_ANDROID)
   browser_demuxer_android_ = new BrowserDemuxerAndroid();
   AddFilter(browser_demuxer_android_);
 #endif
 
   SocketStreamDispatcherHost::GetRequestContextCallback
       request_context_callback(
           base::Bind(&GetRequestContext, request_context,
                      media_request_context));
 
@@ skipping 438 matching lines @@
     switches::kDisableWebAudio,
 #endif
 #if defined(OS_MACOSX)
     // Allow this to be set when invoking the browser and relayed along.
     switches::kEnableSandboxLogging,
 #endif
 #if defined(OS_POSIX)
     switches::kChildCleanExit,
 #endif
 #if defined(OS_WIN)
-    switches::kEnableDirectWrite,
     switches::kEnableHighResolutionTime,
     switches::kHighDPISupport,
 #endif
   };
   renderer_cmd->CopySwitchesFrom(browser_cmd, kSwitchNames,
                                  arraysize(kSwitchNames));
 
   if (browser_cmd.HasSwitch(switches::kTraceStartup) &&
       BrowserMainLoop::GetInstance()->is_tracing_startup()) {
     // Pass kTraceStartup switch to renderer only if startup tracing has not
@@ skipping 935 matching lines @@
         child_process_launcher_->GetHandle();
     base::PlatformFile client_file =
         PlatformFileFromScopedPlatformHandle(channel_pair.PassClientHandle());
     Send(new MojoMsg_ChannelCreated(
              IPC::GetFileHandleForProcess(client_file, process_handle, true)));
   }
 }
 #endif
 
 }  // namespace content