Added UMA metrics for ChromeOS first-run UI.

chrome/browser/chromeos/extensions/first_run_private_api.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 "chrome/browser/chromeos/extensions/first_run_private_api.h"
 
+#include "base/metrics/histogram.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/first_run/first_run.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/webui/web_ui_util.h"
 
 bool FirstRunPrivateGetLocalizedStringsFunction::RunImpl() {
+  UMA_HISTOGRAM_COUNTS("CrosFirstRun.DialogShown", 1);
   base::DictionaryValue* localized_strings = new base::DictionaryValue();
   chromeos::User* user =
       chromeos::UserManager::Get()->GetUserByProfile(GetProfile());
   if (!user->given_name().empty()) {
     localized_strings->SetString(
         "greetingHeader",
         l10n_util::GetStringFUTF16(IDS_FIRST_RUN_GREETING_STEP_HEADER,
                                    user->given_name()));
   } else {
     localized_strings->SetString(
@@ skipping 14 matching lines @@
       l10n_util::GetStringUTF16(IDS_CLOSE));
   webui::SetFontAndTextDirection(localized_strings);
   SetResult(localized_strings);
   return true;
 }
 
 bool FirstRunPrivateLaunchTutorialFunction::RunImpl() {
   chromeos::first_run::LaunchTutorial();
   return true;
 }