Support DirectWrite with sandbox on

content/browser/renderer_host/render_message_filter.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/browser/renderer_host/render_message_filter.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 66 matching lines @@
 #else
 #include "gpu/GLES2/gl2extchromium.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
 #endif
 #if defined(OS_POSIX)
 #include "base/file_descriptor_posix.h"
 #endif
 #if defined(OS_WIN)
 #include "content/common/font_cache_dispatcher_win.h"
+#include "content/common/sandbox_win.h"
 #endif
 #if defined(OS_ANDROID)
 #include "media/base/android/webaudio_media_codec_bridge.h"
 #endif
 
 using net::CookieStore;
 
 namespace content {
 namespace {
 
@@ skipping 1097 matching lines @@
       return;
   }
 
   GpuDataManagerImpl::GetInstance()->BlockDomainFrom3DAPIs(
       top_origin_url, guilt);
 }
 
 #if defined(OS_WIN)
 void RenderMessageFilter::OnPreCacheFontCharacters(const LOGFONT& font,
                                                    const base::string16& str) {
+  if (!ShouldUseDirectWrite())

[cpu_(ooo_6.6-7.5), 2014/03/25 20:47:31]

add todo here to unify this in the filter.

+    return;
   // First, comments from FontCacheDispatcher::OnPreCacheFont do apply here too.
   // Except that for True Type fonts,
   // GetTextMetrics will not load the font in memory.
   // The only way windows seem to load properly, it is to create a similar
   // device (like the one in which we print), then do an ExtTextOut,
   // as we do in the printing thread, which is sandboxed.
   HDC hdc = CreateEnhMetaFile(NULL, NULL, NULL, NULL);
   HFONT font_handle = CreateFontIndirect(&font);
   DCHECK(NULL != font_handle);
 
@@ skipping 98 matching lines @@
   }
 
   // Fallback to fake GpuMemoryBuffer that is backed by shared memory and
   // requires an upload before it can be used as a texture.
   handle->type = gfx::SHARED_MEMORY_BUFFER;
   ChildProcessHostImpl::AllocateSharedMemory(
       static_cast<size_t>(buffer_size), PeerHandle(), &handle->handle);
 }
 
 }  // namespace content