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

chrome/browser/managed_mode/managed_user_settings_service_unittest.cc

 // Copyright 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 "base/bind.h"
 #include "base/callback.h"
 #include "base/json/json_reader.h"
 #include "base/prefs/testing_pref_store.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/managed_mode/managed_user_settings_service.h"
@@ skipping 117 matching lines @@
       expected_value = atomic_setting_value_.get();
     } else {
       EXPECT_TRUE(StartsWithASCII(managed_user_setting.name(),
                                   std::string(kSplitItemName) + ':',
                                   true));
       std::string key =
           managed_user_setting.name().substr(strlen(kSplitItemName) + 1);
       EXPECT_TRUE(split_items_.GetWithoutPathExpansion(key, &expected_value));
     }
 
-    scoped_ptr<Value> value(
+    scoped_ptr<base::Value> value(
         base::JSONReader::Read(managed_user_setting.value()));
     EXPECT_TRUE(expected_value->Equals(value.get()));
   }
 
   void OnNewSettingsAvailable(const base::DictionaryValue* settings) {
     if (!settings)
       settings_.reset();
     else
       settings_.reset(settings->DeepCopy());
   }
@@ skipping 167 matching lines @@
   // The uploaded items should not show up as settings.
   const base::Value* value = NULL;
   EXPECT_FALSE(settings_->GetWithoutPathExpansion(kAtomicItemName, &value));
   EXPECT_FALSE(settings_->GetWithoutPathExpansion(kSplitItemName, &value));
 
   // Restarting sync should not create any new changes.
   settings_service_.StopSyncing(syncer::MANAGED_USER_SETTINGS);
   StartSyncing(sync_data);
   ASSERT_EQ(0u, sync_processor_->changes().size());
 }