Fix minor style issue

ios/public/provider/chrome/browser/string_provider.h

 // Copyright 2013 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_PUBLIC_PROVIDER_CHROME_BROWSER_STRING_PROVIDER_H_
 #define IOS_PUBLIC_PROVIDER_CHROME_BROWSER_STRING_PROVIDER_H_
 
 #include "base/strings/string16.h"
 
 namespace ios {
 
 // A class that provides access to localized strings.
 class StringProvider {
  public:
-  StringProvider() {};
-  virtual ~StringProvider() {};
+  StringProvider() {}
+  virtual ~StringProvider() {}
 
   // Strings used in //ios/chrome.
   // TODO(droger): Find a long term solution for strings used in //ios/chrome.
 
   // Returns a generic "Done" string.
   virtual base::string16 GetDoneString() = 0;
   // Returns the product name (e.g. "Google Chrome").
   virtual base::string16 GetProductName() = 0;
 };
 
 }  // namespace ios
 
 #endif  // IOS_PUBLIC_PROVIDER_CHROME_BROWSER_STRING_PROVIDER_H_