[Autofill] Add UMA timing metrics for requestAutocomplete dialog.

chrome/browser/autofill/autocheckout_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_AUTOFILL_AUTOCHECKOUT_MANAGER_H_
 #define CHROME_BROWSER_AUTOFILL_AUTOCHECKOUT_MANAGER_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/string16.h"
 
 class AutofillField;
 class AutofillManager;
 class AutofillProfile;
 class CreditCard;
 class FormStructure;
 class GURL;
 
 struct FormData;
 struct FormFieldData;
 
-namespace autofill {
-struct WebElementDescriptor;
-}
-
 namespace content {
 struct SSLStatus;
 }
 
+namespace autofill {
+
+struct WebElementDescriptor;
+
 class AutocheckoutManager {
  public:
   explicit AutocheckoutManager(AutofillManager* autofill_manager);
 
   // Sets proceed element to use when filling forms on the current page.
-  void SetProceedElementDescriptor(
-    const autofill::WebElementDescriptor& proceed);
+  void SetProceedElementDescriptor(const WebElementDescriptor& proceed);
 
   // Fill all the forms seen by the Autofill manager with the information
   // gathered from the requestAutocomplete dialog.
   void FillForms();
 
   // Show the requestAutocomplete dialog.
   virtual void ShowAutocheckoutDialog(const GURL& frame_url,
                                       const content::SSLStatus& ssl_status);
 
   virtual ~AutocheckoutManager();
@@ skipping 12 matching lines @@
   string16 cvv_;
 
   // Profile built using the data supplied by requestAutocomplete dialog.
   scoped_ptr<AutofillProfile> profile_;
 
   // Credit card built using the data supplied by requestAutocomplete dialog.
   scoped_ptr<CreditCard> credit_card_;
 
   // Descriptor of the web element to click in order to proceed in the
   // Autocheckout flow.
-  scoped_ptr<autofill::WebElementDescriptor> proceed_descriptor_;
+  scoped_ptr<WebElementDescriptor> proceed_descriptor_;
 
   base::WeakPtrFactory<AutocheckoutManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AutocheckoutManager);
 };
 
+}  // namespace autofill
+
 #endif  // CHROME_BROWSER_AUTOFILL_AUTOCHECKOUT_MANAGER_H_