Enable DirectWrite for font metrics and font rendering in Chrome UI on Windows by default.

content/browser/browser_main_runner.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/browser/browser_main_runner.h"
 
 #include "base/allocator/allocator_shim.h"
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/leak_annotations.h"
@@ skipping 101 matching lines @@
   DWORD dummy = 0;
   CHECK(::VirtualProtect(cert_verify_signature_ptr, 5, old_protect, &dummy));
   CHECK(::VirtualProtect(g_real_crypt_verify_signature_stub,
                          sidestep::kMaxPreambleStubSize, old_protect,
                          &old_protect));
 #endif  // _WIN64
 }
 
 void MaybeEnableDirectWriteFontRendering() {
   if (gfx::win::ShouldUseDirectWrite() &&
-      CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableDirectWriteForUI) &&
+      !CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableDirectWriteForUI) &&
       !CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableHarfBuzzRenderText)) {
     typedef decltype(DWriteCreateFactory)* DWriteCreateFactoryProc;
     HMODULE dwrite_dll = LoadLibraryW(L"dwrite.dll");
     if (!dwrite_dll)
       return;
 
     DWriteCreateFactoryProc dwrite_create_factory_proc =
         reinterpret_cast<DWriteCreateFactoryProc>(
             GetProcAddress(dwrite_dll, "DWriteCreateFactory"));
@@ skipping 184 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(BrowserMainRunnerImpl);
 };
 
 // static
 BrowserMainRunner* BrowserMainRunner::Create() {
   return new BrowserMainRunnerImpl();
 }
 
 }  // namespace content