Implement WebPrescientNetworking to trigger preconnect from Blink

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 87 matching lines @@
                                       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 void Preconnect(const GURL& url,
+                          WebKit::WebPreconnectMotivation motivation,
+                          uint32_t motivationVariationId) 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,
                                       const GURL& first_party_for_cookies,
@@ skipping 55 matching lines @@
   scoped_ptr<RendererNetPredictor> net_predictor_;
   scoped_ptr<SpellCheck> spellcheck_;
   scoped_ptr<components::VisitedLinkSlave> visited_link_slave_;
   scoped_ptr<safe_browsing::PhishingClassifierFilter> phishing_classifier_;
   scoped_ptr<prerender::PrerenderDispatcher> prerender_dispatcher_;
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_