remove implementation of obsolete WebKitPlatformSupport::prefetchHostName.

content/public/renderer/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 CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 #define CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 
 #include <string>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 193 matching lines @@
                                       int extension_group,
                                       int world_id) {}
   virtual void WillReleaseScriptContext(WebKit::WebFrame* frame,
                                         v8::Handle<v8::Context>,
                                         int world_id) {}
 
   // See WebKit::Platform.
   virtual unsigned long long VisitedLinkHash(const char* canonical_url,
                                              size_t length);
   virtual bool IsLinkVisited(unsigned long long link_hash);
-  virtual void PrefetchHostName(const char* hostname, size_t length) {}
   virtual WebKit::WebPrescientNetworking* GetPrescientNetworking();
   virtual bool ShouldOverridePageVisibilityState(
       const RenderView* render_view,
       WebKit::WebPageVisibilityState* override_state) const;
 
   // Return true if the GetCookie request will be handled by the embedder.
   // Cookies are returned in the cookie parameter.
   virtual bool HandleGetCookieRequest(RenderView* sender,
                                       const GURL& url,
                                       const GURL& first_party_for_cookies,
@@ skipping 18 matching lines @@
   // Returns whether BrowserPlugin should be allowed within the |container|.
   virtual bool AllowBrowserPlugin(WebKit::WebPluginContainer* container) const;
 
   // Returns true if the page at |url| can use Pepper MediaStream APIs.
   virtual bool AllowPepperMediaStreamAPI(const GURL& url) const;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_