Revert of GetAccountIdFromProfile() should not return an empty account id if a valid profile is provided.

components/signin/core/browser/fake_signin_manager.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.
 
 #ifndef COMPONENTS_SIGNIN_CORE_BROWSER_FAKE_SIGNIN_MANAGER_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_FAKE_SIGNIN_MANAGER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "build/build_config.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/signin/core/browser/signin_metrics.h"
 
 // SigninManager to use for testing. Tests should use the type
 // SigninManagerForTesting to ensure that the right type for their platform is
 // used.
 
 // Overrides InitTokenService to do-nothing in tests.
 class FakeSigninManagerBase : public SigninManagerBase {
  public:
   FakeSigninManagerBase(SigninClient* client,
                         AccountTrackerService* account_tracker_service);
   ~FakeSigninManagerBase() override;
-
-  void SignIn(const std::string& account_id);
 };
 
 #if !defined(OS_CHROMEOS)
 
 // A signin manager that bypasses actual authentication routines with servers
 // and accepts the credentials provided to StartSignIn.
 class FakeSigninManager : public SigninManager {
  public:
   FakeSigninManager(SigninClient* client,
                     ProfileOAuth2TokenService* token_service,
@@ skipping 27 matching lines @@
 
   void CompletePendingSignin() override;
 
   // Username specified in StartSignInWithRefreshToken() call.
   std::string username_;
 };
 
 #endif  // !defined (OS_CHROMEOS)
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_FAKE_SIGNIN_MANAGER_H_