Control DirectWrite from browser side, no RuntimeEnabledFeature any more.

content/renderer/renderer_main_platform_delegate_win.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/renderer/renderer_main_platform_delegate.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/win_util.h"
 #include "base/win/windows_version.h"
 #include "content/common/sandbox_win.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/injection_test_win.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/renderer/render_thread_impl.h"
 #include "sandbox/win/src/sandbox.h"
 #include "skia/ext/vector_platform_device_emf_win.h"
+#include "third_party/WebKit/public/web/win/WebFontRendering.h"
 #include "third_party/icu/source/i18n/unicode/timezone.h"
 #include "third_party/skia/include/ports/SkTypeface_win.h"
 
 #ifdef ENABLE_VTUNE_JIT_INTERFACE
 #include "v8/src/third_party/vtune/v8-vtune.h"
 #endif
 
 #include <dwrite.h>
 
 namespace content {
@@ skipping 80 matching lines @@
 
 #ifdef ENABLE_VTUNE_JIT_INTERFACE
   if (command_line.HasSwitch(switches::kEnableVtune))
     vTune::InitializeVtuneForV8();
 #endif
 
   // Be mindful of what resources you acquire here. They can be used by
   // malicious code if the renderer gets compromised.
   bool no_sandbox = command_line.HasSwitch(switches::kNoSandbox);
 
+  bool use_direct_write = ShouldUseDirectWrite();
   if (!no_sandbox) {
     // ICU DateFormat class (used in base/time_format.cc) needs to get the
     // Olson timezone ID by accessing the registry keys under
     // HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones.
     // After TimeZone::createDefault is called once here, the timezone ID is
     // cached and there's no more need to access the registry. If the sandbox
     // is disabled, we don't have to make this dummy call.
     scoped_ptr<icu::TimeZone> zone(icu::TimeZone::createDefault());
 
-    if (ShouldUseDirectWrite()) {
+    if (use_direct_write) {
       WarmupDirectWrite();
     } else {
       SkTypeface_SetEnsureLOGFONTAccessibleProc(SkiaPreCacheFont);
       skia::SetSkiaEnsureTypefaceCharactersAccessible(
           SkiaPreCacheFontCharacters);
     }
   }
+  blink::WebFontRendering::setUseDirectWrite(use_direct_write);
+  blink::WebFontRendering::setUseSubpixelPositioning(use_direct_write);
 }
 
 void RendererMainPlatformDelegate::PlatformUninitialize() {
 }
 
 bool RendererMainPlatformDelegate::InitSandboxTests(bool no_sandbox) {
   const CommandLine& command_line = parameters_.command_line;
 
   DVLOG(1) << "Started renderer with " << command_line.GetCommandLineString();
 
@@ skipping 41 matching lines @@
     if (run_security_tests) {
       int test_count = 0;
       DVLOG(1) << "Running renderer security tests";
       BOOL result = run_security_tests(&test_count);
       CHECK(result) << "Test number " << test_count << " has failed.";
     }
   }
 }
 
 }  // namespace content