Convert SetContentSettingRules to use mojo, part 1/2.

chrome/common/content_settings_pattern_serializer.h

 // Copyright (c) 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.
 
 #ifndef CHROME_COMMON_CONTENT_SETTINGS_PATTERN_SERIALIZER_H_
 #define CHROME_COMMON_CONTENT_SETTINGS_PATTERN_SERIALIZER_H_
 
 #include "base/macros.h"
 
 namespace base {
 class Pickle;
 class PickleIterator;
 class PickleSizer;
 }
 
 class ContentSettingsPattern;
 
+// TODO(nigeltao): delete this class, once content settings is Mojofied.
 class ContentSettingsPatternSerializer {
  public:
   // Gets the serialized pattern's size.
   static void GetSize(const ContentSettingsPattern& pattern,
                       base::PickleSizer* s);
 
   // Serializes the pattern to an IPC message.
   static void WriteToMessage(const ContentSettingsPattern& pattern,
                              base::Pickle* m);
   // Deserializes the pattern from the IPC message.
   static bool ReadFromMessage(const base::Pickle* m,
                               base::PickleIterator* iter,
                               ContentSettingsPattern* pattern);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ContentSettingsPatternSerializer);
 };
 
 #endif  // CHROME_COMMON_CONTENT_SETTINGS_PATTERN_SERIALIZER_H_