[Cleanup] Const-correct the profile() method for the EasyUnlockService

chrome/browser/ui/webui/options/browser_options_handler.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/ui/webui/options/browser_options_handler.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 519 matching lines @@
   values->SetString("hotwordLearnMoreURL", chrome::kHotwordLearnMoreURL);
   RegisterTitle(values, "hotwordConfirmOverlay",
                 IDS_HOTWORD_CONFIRM_BUBBLE_TITLE);
   values->SetString("hotwordManageAudioHistoryURL",
                     chrome::kManageAudioHistoryURL);
 
 #if defined(OS_CHROMEOS)
   Profile* profile = Profile::FromWebUI(web_ui());
   std::string username = profile->GetProfileUserName();
   if (username.empty()) {
-    user_manager::User* user =
+    const user_manager::User* user =
         chromeos::ProfileHelper::Get()->GetUserByProfile(profile);
     if (user && (user->GetType() != user_manager::USER_TYPE_GUEST))
       username = user->email();
   }
   if (!username.empty())
     username = gaia::SanitizeEmail(gaia::CanonicalizeEmail(username));
 
   values->SetString("username", username);
 #endif
   // Pass along sync status early so it will be available during page init.
@@ skipping 1569 matching lines @@
 void BrowserOptionsHandler::OnPolicyUpdated(const policy::PolicyNamespace& ns,
                                             const policy::PolicyMap& previous,
                                             const policy::PolicyMap& current) {
   std::set<std::string> different_keys;
   current.GetDifferingKeys(previous, &different_keys);
   if (ContainsKey(different_keys, policy::key::kMetricsReportingEnabled))
     SetupMetricsReportingCheckbox();
 }
 
 }  // namespace options