[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 406550e2b53e4b9885335de92804500dd9d3d346..23ac75a526869739730e9f915324eaffeca42467 100644
--- a/chrome/browser/signin/easy_unlock_service.h
+++ b/chrome/browser/signin/easy_unlock_service.h
@@ -219,7 +219,8 @@ 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_; }
 
   // Opens an Easy Unlock Setup app window.
   void OpenSetupApp();