Cleanup: Return additional schemes vector as out parameter from GetAdditionalWebUISchemes

content/public/browser/content_browser_client.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 CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 133 matching lines @@
 
   // Returns whether all instances of the specified effective URL should be
   // rendered by the same process, rather than using process-per-site-instance.
   virtual bool ShouldUseProcessPerSite(BrowserContext* browser_context,
                                        const GURL& effective_url);
 
   // Returns a list additional WebUI schemes, if any.  These additional schemes
   // act as aliases to the chrome: scheme.  The additional schemes may or may
   // not serve specific WebUI pages depending on the particular URLDataSource
   // and its override of URLDataSource::ShouldServiceRequest.
-  virtual std::vector<std::string> GetAdditionalWebUISchemes();
+  virtual void GetAdditionalWebUISchemes(
+      std::vector<std::string>* additional_schemes) {}
 
   // Creates the main net::URLRequestContextGetter. Should only be called once
   // per ContentBrowserClient object.
   // TODO(ajwong): Remove once http://crbug.com/159193 is resolved.
   virtual net::URLRequestContextGetter* CreateRequestContext(
       BrowserContext* browser_context,
       ProtocolHandlerMap* protocol_handlers);
 
   // Creates the net::URLRequestContextGetter for a StoragePartition. Should
   // only be called once per partition_path per ContentBrowserClient object.
@@ skipping 355 matching lines @@
   // This is called on a worker thread.
   virtual
       crypto::CryptoModuleBlockingPasswordDelegate* GetCryptoPasswordDelegate(
           const GURL& url);
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_