Fix implicit access to raw pointer of scoped_refptr.

ui/gfx/win/direct_write.cc

 // Copyright 2014 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 "ui/gfx/win/direct_write.h"
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/win/registry.h"
 #include "base/win/scoped_comptr.h"
@@ skipping 36 matching lines @@
   tried_dwrite_initialize = true;
 
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableDirectWriteForUI)) {
     return;
   }
 
   base::win::ScopedComPtr<IDWriteFactory> factory;
   CreateDWriteFactory(factory.Receive());
 
-  if (factory == nullptr)
+  if (!factory)
     return;
 
   // The skia call to create a new DirectWrite font manager instance can fail
   // if we are unable to get the system font collection from the DirectWrite
   // factory. The GetSystemFontCollection method in the IDWriteFactory
   // interface fails with E_INVALIDARG on certain Windows 7 gold versions
   // (6.1.7600.*). We should just use GDI in these cases.
   SkFontMgr* direct_write_font_mgr = SkFontMgr_New_DirectWrite(factory.get());
   if (!direct_write_font_mgr)
     return;
   SetDefaultSkiaFactory(direct_write_font_mgr);
   gfx::PlatformFontWin::SetDirectWriteFactory(factory.get());
 }
 
 }  // namespace win
 }  // namespace gfx