Enable strict-virtual-specifiers for iOS builds.

components/signin/core/browser/test_signin_client.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 COMPONENTS_SIGNIN_CORE_BROWSER_TEST_SIGNIN_CLIENT_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_TEST_SIGNIN_CLIENT_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 48 matching lines @@
 
   // Returns a TestURLRequestContextGetter or an manually provided
   // URLRequestContextGetter.
   net::URLRequestContextGetter* GetURLRequestContext() override;
 
   // For testing purposes, can override the TestURLRequestContextGetter created
   // in the default constructor.
   void SetURLRequestContext(net::URLRequestContextGetter* request_context);
 
 #if defined(OS_IOS)
-  virtual ios::ProfileOAuth2TokenServiceIOSProvider* GetIOSProvider() override;
+  ios::ProfileOAuth2TokenServiceIOSProvider* GetIOSProvider() override;
 #endif
 
   // Returns true.
   bool ShouldMergeSigninCredentialsIntoCookieJar() override;
 
   // Registers |callback| and returns the subscription.
   // Note that |callback| will never be called.
   scoped_ptr<SigninClient::CookieChangedSubscription> AddCookieChangedCallback(
       const GURL& url,
       const std::string& name,
@@ skipping 25 matching lines @@
   std::string signed_in_password_;
 
 #if defined(OS_IOS)
   scoped_ptr<ios::FakeProfileOAuth2TokenServiceIOSProvider> iosProvider_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(TestSigninClient);
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_TEST_SIGNIN_CLIENT_H_