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

chrome/browser/signin/easy_unlock_service.h

Index: chrome/browser/signin/easy_unlock_service.h
diff --git a/chrome/browser/signin/easy_unlock_service.h b/chrome/browser/signin/easy_unlock_service.h
index caaa460557640140c0f126eb05ba981078bb2704..31d8b7006b40070bd2843752ad62362753416644 100644
--- a/chrome/browser/signin/easy_unlock_service.h
+++ b/chrome/browser/signin/easy_unlock_service.h
@@ -198,7 +198,8 @@ class EasyUnlockService : public KeyedService {
   void Shutdown() override;
 
   // Exposes the profile to which the service is attached to subclasses.
-  Profile* profile() const { return profile_; }
+  const Profile* profile() const { return profile_; }
+  Profile* profile() { return profile_; }
 
   // Installs the Easy unlock component app if it isn't installed and enables
   // the app if it is disabled.