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

chrome/browser/chromeos/extensions/external_cache.cc

 // 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.
 
 #include "chrome/browser/chromeos/extensions/external_cache.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/file_util.h"
@@ skipping 179 matching lines @@
                  version));
 }
 
 bool ExternalCache::IsExtensionPending(const std::string& id) {
   // Pending means that there is no installed version yet.
   return extensions_->HasKey(id) && !cached_extensions_->HasKey(id);
 }
 
 bool ExternalCache::GetExtensionExistingVersion(const std::string& id,
                                                 std::string* version) {
-  DictionaryValue* extension_dictionary = NULL;
+  base::DictionaryValue* extension_dictionary = NULL;
   if (cached_extensions_->GetDictionary(id, &extension_dictionary)) {
     if (extension_dictionary->GetString(
             extensions::ExternalProviderImpl::kExternalVersion, version)) {
       return true;
     }
     *version = delegate_->GetInstalledExtensionVersion(id);
     return !version->empty();
   }
   return false;
 }
@@ skipping 343 matching lines @@
                                    FROM_HERE,
                                    callback);
 }
 
 std::string ExternalCache::Delegate::GetInstalledExtensionVersion(
     const std::string& id) {
   return std::string();
 }
 
 }  // namespace chromeos