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

chrome/browser/chromeos/login/login_display_host_impl.h

Index: chrome/browser/chromeos/login/login_display_host_impl.h
diff --git a/chrome/browser/chromeos/login/login_display_host_impl.h b/chrome/browser/chromeos/login/login_display_host_impl.h
index 3c0053998ed78fc64a01d26af26bad6c6092ce6e..6a969a4ebe46ad9de8e94cbce17fa06f4de28114 100644
--- a/chrome/browser/chromeos/login/login_display_host_impl.h
+++ b/chrome/browser/chromeos/login/login_display_host_impl.h
@@ -70,7 +70,7 @@ class LoginDisplayHostImpl : public LoginDisplayHost,
       const GetAutoEnrollmentCheckResultCallback& callback) OVERRIDE;
   virtual void StartWizard(
       const std::string& first_screen_name,
-      scoped_ptr<DictionaryValue> screen_parameters) OVERRIDE;
+      scoped_ptr<base::DictionaryValue> screen_parameters) OVERRIDE;
   virtual WizardController* GetWizardController() OVERRIDE;
   virtual AppLaunchController* GetAppLaunchController() OVERRIDE;
   virtual void StartUserAdding(
@@ -258,7 +258,7 @@ class LoginDisplayHostImpl : public LoginDisplayHost,
 
   // Stored parameters for StartWizard, required to restore in case of crash.
   std::string wizard_first_screen_name_;
-  scoped_ptr<DictionaryValue> wizard_screen_parameters_;
+  scoped_ptr<base::DictionaryValue> wizard_screen_parameters_;
 
   // Old value of the ash::internal::kIgnoreSoloWindowFramePainterPolicy
   // property of the root window for |login_window_|.