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

chrome/browser/signin/screenlock_bridge.cc

 // Copyright 2014 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/signin/screenlock_bridge.h"
 
 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/profiles/profile_window.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
@@ skipping 91 matching lines @@
 void ScreenlockBridge::UserPodCustomIconOptions::SetAriaLabel(
     const base::string16& aria_label) {
   aria_label_ = aria_label;
 }
 
 void ScreenlockBridge::UserPodCustomIconOptions::SetHardlockOnClick() {
   hardlock_on_click_ = true;
 }
 
 // static
-std::string ScreenlockBridge::GetAuthenticatedUserEmail(Profile* profile) {
+std::string ScreenlockBridge::GetAuthenticatedUserEmail(
+    const Profile* profile) {
   // |profile| has to be a signed-in profile with SigninManager already
   // created. Otherwise, just crash to collect stack.
-  SigninManagerBase* signin_manager =
+  const SigninManagerBase* signin_manager =
       SigninManagerFactory::GetForProfileIfExists(profile);
   return signin_manager->GetAuthenticatedUsername();
 }
 
 ScreenlockBridge::ScreenlockBridge() : lock_handler_(NULL) {
 }
 
 ScreenlockBridge::~ScreenlockBridge() {
 }
 
@@ skipping 32 matching lines @@
     lock_handler_->Unlock(GetAuthenticatedUserEmail(profile));
 }
 
 void ScreenlockBridge::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void ScreenlockBridge::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }