Update some uses of Value in chrome/browser to use the base:: namespace.

chrome/browser/chromeos/login/screens/screen_context.h

 // Copyright (c) 2013 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_BROWSER_CHROMEOS_LOGIN_SCREENS_SCREEN_CONTEXT_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_SCREEN_CONTEXT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 50 matching lines @@
   // Returns true if context has |key|.
   bool HasKey(const KeyType& key) const;
 
   // Returns true if there was changes since last call to
   // GetChangesAndReset().
   bool HasChanges() const;
 
   // Stores all changes since the last call to the
   // GetChangesAndReset() in |diff|.  All previous contents of |diff|
   // will be thrown away.
-  void GetChangesAndReset(DictionaryValue* diff);
+  void GetChangesAndReset(base::DictionaryValue* diff);
 
   // Applies changes from |diff| to the context. All keys from |diff|
   // are stored in |keys|.
-  void ApplyChanges(const DictionaryValue& diff,
+  void ApplyChanges(const base::DictionaryValue& diff,
                     std::vector<std::string>* keys);
 
  private:
-  bool Set(const KeyType& key, Value* value);
+  bool Set(const KeyType& key, base::Value* value);
 
   template<typename T>
   T Get(const KeyType& key) {
     DCHECK(CalledOnValidThread());
-    const Value* value;
+    const base::Value* value;
     bool has_key = storage_.Get(key, &value);
     DCHECK(has_key);
     T result;
     if (!ParseValue<T>(value, &result)) {
       NOTREACHED();
       return T();
     }
     return result;
   }
 
   template<typename T>
   T Get(const KeyType& key, const T& default_value) {
     DCHECK(CalledOnValidThread());
     if (!HasKey(key))
       return default_value;
     return Get<T>(key);
   }
 
   // Contains current state of <key, value> map.
-  DictionaryValue storage_;
+  base::DictionaryValue storage_;
 
   // Contains all pending changes.
-  DictionaryValue changes_;
+  base::DictionaryValue changes_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenContext);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_SCREEN_CONTEXT_H_