remove implementation of obsolete WebKitPlatformSupport::prefetchHostName.

chrome/renderer/chrome_content_renderer_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 CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 #define CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 95 matching lines @@
   virtual void DidCreateScriptContext(WebKit::WebFrame* frame,
                                       v8::Handle<v8::Context> context,
                                       int extension_group,
                                       int world_id) OVERRIDE;
   virtual void WillReleaseScriptContext(WebKit::WebFrame* frame,
                                         v8::Handle<v8::Context> context,
                                         int world_id) OVERRIDE;
   virtual unsigned long long VisitedLinkHash(const char* canonical_url,
                                              size_t length) OVERRIDE;
   virtual bool IsLinkVisited(unsigned long long link_hash) OVERRIDE;
-  virtual void PrefetchHostName(const char* hostname, size_t length) OVERRIDE;
   virtual WebKit::WebPrescientNetworking* GetPrescientNetworking() OVERRIDE;
   virtual bool ShouldOverridePageVisibilityState(
       const content::RenderView* render_view,
       WebKit::WebPageVisibilityState* override_state) const OVERRIDE;
   virtual bool HandleGetCookieRequest(content::RenderView* sender,
                                       const GURL& url,
                                       const GURL& first_party_for_cookies,
                                       std::string* cookies) OVERRIDE;
   virtual bool HandleSetCookieRequest(content::RenderView* sender,
                                       const GURL& url,
@@ skipping 77 matching lines @@
 #endif
 
 #if defined(ENABLE_PLUGINS)
   std::set<std::string> allowed_file_handle_origins_;
 #endif
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_