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

chrome/browser/extensions/api/idle/idle_manager.cc

 // Copyright (c) 2012 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/extensions/api/idle/idle_manager.h"
 
 #include <utility>
 
 #include "base/stl_util.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 171 matching lines @@
   idle_time_provider_->CalculateIdleState(threshold, notify);
 }
 
 void IdleManager::SetThreshold(const std::string& extension_id,
                                int threshold) {
   DCHECK(thread_checker_.CalledOnValidThread());
   GetMonitor(extension_id)->threshold = threshold;
 }
 
 // static
-StringValue* IdleManager::CreateIdleValue(IdleState idle_state) {
+base::StringValue* IdleManager::CreateIdleValue(IdleState idle_state) {
   const char* description;
 
   if (idle_state == IDLE_STATE_ACTIVE) {
     description = keys::kStateActive;
   } else if (idle_state == IDLE_STATE_IDLE) {
     description = keys::kStateIdle;
   } else {
     description = keys::kStateLocked;
   }
 
-  return new StringValue(description);
+  return new base::StringValue(description);
 }
 
 void IdleManager::SetEventDelegateForTest(
     scoped_ptr<EventDelegate> event_delegate) {
   DCHECK(thread_checker_.CalledOnValidThread());
   event_delegate_ = event_delegate.Pass();
 }
 
 void IdleManager::SetIdleTimeProviderForTest(
     scoped_ptr<IdleTimeProvider> idle_time_provider) {
@@ skipping 61 matching lines @@
       event_delegate_->OnStateChanged(it->first, new_state);
     }
   }
 
   if (listener_count == 0) {
     StopPolling();
   }
 }
 
 }  // namespace extensions