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

chrome/browser/chromeos/login/login_display_host_impl.cc

Index: chrome/browser/chromeos/login/login_display_host_impl.cc
diff --git a/chrome/browser/chromeos/login/login_display_host_impl.cc b/chrome/browser/chromeos/login/login_display_host_impl.cc
index 636908e15520e6422510329330e82d6b373072b1..dabfb28033ed38670e05afe27da37dd8fce17569 100644
--- a/chrome/browser/chromeos/login/login_display_host_impl.cc
+++ b/chrome/browser/chromeos/login/login_display_host_impl.cc
@@ -182,7 +182,7 @@ void ShowLoginWizardFinish(
     const std::string& first_screen_name,
     const chromeos::StartupCustomizationDocument* startup_manifest,
     chromeos::LoginDisplayHost* display_host) {
-  scoped_ptr<DictionaryValue> params;
+  scoped_ptr<base::DictionaryValue> params;
   display_host->StartWizard(first_screen_name, params.Pass());
 
   chromeos::DBusThreadManager::Get()->
@@ -486,7 +486,7 @@ void LoginDisplayHostImpl::GetAutoEnrollmentCheckResult(
 
 void LoginDisplayHostImpl::StartWizard(
     const std::string& first_screen_name,
-    scoped_ptr<DictionaryValue> screen_parameters) {
+    scoped_ptr<base::DictionaryValue> screen_parameters) {
   startup_sound_honors_spoken_feedback_ = false;
   TryToPlayStartupSound();
 
@@ -1123,7 +1123,7 @@ void ShowLoginWizard(const std::string& first_screen_name) {
       !g_browser_process->browser_policy_connector()->IsEnterpriseManaged();
   if (should_show_enrollment_screen) {
     display_host->StartWizard(chromeos::WizardController::kEnrollmentScreenName,
-                              scoped_ptr<DictionaryValue>());
+                              scoped_ptr<base::DictionaryValue>());
     return;
   }