Remove MutableProfileOAuth2TokenService on iOS.

ios/public/test/fake_profile_oauth2_token_service_ios_provider.h

 // 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.
 
 #ifndef IOS_TEST_MOCK_PROFILE_OAUTH2_TOKEN_SERVICE_PROVIDER_IOS_H_
 #define IOS_TEST_MOCK_PROFILE_OAUTH2_TOKEN_SERVICE_PROVIDER_IOS_H_
 
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "ios/public/provider/components/signin/browser/profile_oauth2_token_service_ios_provider.h"
 
 namespace ios {
 
 // Mock class of ProfileOAuth2TokenServiceIOSProvider for testing.
 class FakeProfileOAuth2TokenServiceIOSProvider
     : public ProfileOAuth2TokenServiceIOSProvider {
  public:
   FakeProfileOAuth2TokenServiceIOSProvider();
   virtual ~FakeProfileOAuth2TokenServiceIOSProvider();
 
   // ProfileOAuth2TokenServiceIOSProvider
-  virtual bool IsUsingSharedAuthentication() const OVERRIDE;
   virtual void InitializeSharedAuthentication() OVERRIDE;
 
   virtual void GetAccessToken(const std::string& account_id,
                               const std::string& client_id,
                               const std::string& client_secret,
                               const std::set<std::string>& scopes,
                               const AccessTokenCallback& callback) OVERRIDE;
 
   virtual std::vector<std::string> GetAllAccountIds() OVERRIDE;
 
   virtual AuthenticationErrorCategory GetAuthenticationErrorCategory(
       NSError* error) const OVERRIDE;
 
   // Methods to configure this fake provider.
   void AddAccount(const std::string& account_id);
   void SetAccounts(const std::vector<std::string>& accounts);
   void ClearAccounts();
-  void set_using_shared_authentication(bool is_using_shared_authentication) {
-    is_using_shared_authentication_ = is_using_shared_authentication;
-  }
 
   // Issues access token responses.
   void IssueAccessTokenForAllRequests();
   void IssueAccessTokenErrorForAllRequests();
 
  private:
   typedef std::pair<std::string, AccessTokenCallback> AccessTokenRequest;
 
   std::vector<std::string> accounts_;
-  bool is_using_shared_authentication_;
   std::vector<AccessTokenRequest> requests_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeProfileOAuth2TokenServiceIOSProvider);
 };
 
 }  // namespace ios
 
 #endif  // IOS_TEST_PROVIDER_CHROME_BROWSER_SIGNIN_MOCK_PROFILE_OAUTH2_TOKEN_SERVICE_PROVIDER_IOS_H_