remove implementation of obsolete WebKitPlatformSupport::prefetchHostName.

content/ppapi_plugin/ppapi_webkitplatformsupport_impl.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_PPAPI_PLUGIN_PPAPI_WEBKITPLATFORMSUPPORT_IMPL_H_
 #define CONTENT_PPAPI_PLUGIN_PPAPI_WEBKITPLATFORMSUPPORT_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/child/webkitplatformsupport_impl.h"
@@ skipping 14 matching lines @@
   virtual unsigned long long visitedLinkHash(const char* canonicalURL,
                                              size_t length);
   virtual bool isLinkVisited(unsigned long long linkHash);
   virtual WebKit::WebMessagePortChannel* createMessagePortChannel();
   virtual void setCookies(const WebKit::WebURL& url,
                           const WebKit::WebURL& first_party_for_cookies,
                           const WebKit::WebString& value);
   virtual WebKit::WebString cookies(
       const WebKit::WebURL& url,
       const WebKit::WebURL& first_party_for_cookies);
-  virtual void prefetchHostName(const WebKit::WebString&);
   virtual WebKit::WebString defaultLocale();
   virtual WebKit::WebThemeEngine* themeEngine();
   virtual WebKit::WebURLLoader* createURLLoader();
   virtual WebKit::WebSocketStreamHandle* createSocketStreamHandle();
   virtual void getPluginList(bool refresh, WebKit::WebPluginListBuilder*);
   virtual WebKit::WebData loadResource(const char* name);
   virtual WebKit::WebStorageNamespace* createLocalStorageNamespace();
   virtual void dispatchStorageEvent(const WebKit::WebString& key,
       const WebKit::WebString& oldValue, const WebKit::WebString& newValue,
       const WebKit::WebString& origin, const WebKit::WebURL& url,
       bool isLocalStorage);
   virtual int databaseDeleteFile(const WebKit::WebString& vfs_file_name,
                                  bool sync_dir);
 
  private:
   class SandboxSupport;
   scoped_ptr<SandboxSupport> sandbox_support_;
 
   DISALLOW_COPY_AND_ASSIGN(PpapiWebKitPlatformSupportImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PPAPI_PLUGIN_PPAPI_WEBKITPLATFORMSUPPORT_IMPL_H_