Allow Registry Iterator functions to use a specified WOW64 mode when iterating.

ui/gfx/font_fallback_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 "ui/gfx/font_fallback_win.h"
 
 #include <usp10.h>
 
 #include <map>
 
 #include "base/memory/singleton.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/registry.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/font_fallback.h"
 
 namespace gfx {
 
 namespace {
 
 // Queries the registry to get a mapping from font filenames to font names.
 void QueryFontsFromRegistry(std::map<std::string, std::string>* map) {
   const wchar_t* kFonts =
       L"Software\\Microsoft\\Windows NT\\CurrentVersion\\Fonts";
 
-  base::win::RegistryValueIterator it(HKEY_LOCAL_MACHINE, kFonts);
+  // This registry key is "shared" between 32-bit and 64-bit hive so safe to
+  // access without any WOW64 access flag. See
+  // http://msdn.microsoft.com/en-us/library/windows/desktop/aa384253.aspx.
+  base::win::RegistryValueIterator it(HKEY_LOCAL_MACHINE, kFonts, 0);
   for (; it.Valid(); ++it) {
     const std::string filename =
         base::StringToLowerASCII(base::WideToUTF8(it.Value()));
     (*map)[filename] = base::WideToUTF8(it.Name());
   }
 }
 
 // Fills |font_names| with a list of font families found in the font file at
 // |filename|. Takes in a |font_map| from font filename to font families, which
 // is filled-in by querying the registry, if empty.
@@ skipping 275 matching lines @@
                      font.GetFontSize());
       found_fallback = true;
     }
   }
   DeleteEnhMetaFile(meta_file);
 
   return found_fallback;
 }
 
 }  // namespace gfx