Replace direct access to kGoogleServicesUsername with calls to SigninManager.

chrome/browser/profiles/profile_impl.h

 // 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.
 
 // This class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 
 #include <string>
@@ skipping 168 matching lines @@
 
   void EnsureSessionServiceCreated();
 #endif
 
 
   void EnsureRequestContextCreated() {
     GetRequestContext();
   }
 
   // Updates the ProfileInfoCache with data from this profile.
-  void UpdateProfileUserNameCache();
   void UpdateProfileSupervisedUserIdCache();
   void UpdateProfileNameCache();
   void UpdateProfileAvatarCache();
   void UpdateProfileIsEphemeralCache();
 
   void GetCacheParameters(bool is_media_context,
                           base::FilePath* cache_path,
                           int* max_size);
 
   PrefProxyConfigTracker* CreateProxyConfigTracker();
@@ skipping 83 matching lines @@
   // components/keyed_service/content/browser_context_keyed_service_factory.*
 
   Profile::Delegate* delegate_;
 
   chrome_browser_net::Predictor* predictor_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileImpl);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_