Switch various ValueTypeToString()s to base::Value::GetTypeName().

components/prefs/pref_value_map.h

 // Copyright (c) 2011 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 COMPONENTS_PREFS_PREF_VALUE_MAP_H_
 #define COMPONENTS_PREFS_PREF_VALUE_MAP_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 33 matching lines @@
   // Clears the map.
   void Clear();
 
   // Swaps the contents of two maps.
   void Swap(PrefValueMap* other);
 
   iterator begin();
   iterator end();
   const_iterator begin() const;
   const_iterator end() const;
+  bool empty() const;
 
   // Gets a boolean value for |key| and stores it in |value|. Returns true if
   // the value was found and of the proper type.
   bool GetBoolean(const std::string& key, bool* value) const;
 
   // Sets the value for |key| to the boolean |value|.
   void SetBoolean(const std::string& key, bool value);
 
   // Gets a string value for |key| and stores it in |value|. Returns true if
   // the value was found and of the proper type.
@@ skipping 18 matching lines @@
   void GetDifferingKeys(const PrefValueMap* other,
                         std::vector<std::string>* differing_keys) const;
 
  private:
   Map prefs_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefValueMap);
 };
 
 #endif  // COMPONENTS_PREFS_PREF_VALUE_MAP_H_