Add logic to switch to DirectWrite font proxy via field trial.

content/browser/renderer_host/render_process_host_impl.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.
 
 // 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 171 matching lines @@
 #include "content/browser/android/child_process_launcher_android.h"
 #include "content/browser/media/android/browser_demuxer_android.h"
 #include "content/browser/mojo/service_registrar_android.h"
 #include "content/browser/screen_orientation/screen_orientation_message_filter_android.h"
 #include "ipc/ipc_sync_channel.h"
 #endif
 
 #if defined(OS_WIN)
 #include "base/win/scoped_com_initializer.h"
 #include "base/win/windows_version.h"
+#include "content/browser/renderer_host/dwrite_font_proxy_message_filter_win.h"
 #include "content/common/font_cache_dispatcher_win.h"
 #include "content/common/sandbox_win.h"
 #include "sandbox/win/src/sandbox_policy.h"
 #include "ui/gfx/win/dpi.h"
 #endif
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 #include "content/browser/bootstrap_sandbox_manager_mac.h"
 #include "content/browser/mach_broker_mac.h"
 #endif
@@ skipping 728 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)
+  AddFilter(new DWriteFontProxyMessageFilter());
+
   // The FontCacheDispatcher is required only when we're using GDI rendering.
   // TODO(scottmg): pdf/ppapi still require the renderer to be able to precache
   // GDI fonts (http://crbug.com/383227), even when using DirectWrite. This
   // should eventually be if (!ShouldUseDirectWrite()) guarded.
   channel_->AddFilter(new FontCacheDispatcher());
 #elif defined(OS_ANDROID)
   browser_demuxer_android_ = new BrowserDemuxerAndroid();
   AddFilter(browser_demuxer_android_.get());
 #endif
 #if defined(ENABLE_BROWSER_CDMS)
@@ skipping 1794 matching lines @@
 void RenderProcessHostImpl::GetAudioOutputControllers(
     const GetAudioOutputControllersCallback& callback) const {
   audio_renderer_host()->GetOutputControllers(callback);
 }
 
 BluetoothDispatcherHost* RenderProcessHostImpl::GetBluetoothDispatcherHost() {
   return bluetooth_dispatcher_host_.get();
 }
 
 }  // namespace content