Implement WebPrescientNetworking to trigger preconnect from Blink

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/string16.h"
@@ skipping 17 matching lines @@
 namespace WebKit {
 class WebClipboard;
 class WebFrame;
 class WebHyphenator;
 class WebMediaPlayerClient;
 class WebMediaStreamCenter;
 class WebMediaStreamCenterClient;
 class WebMimeRegistry;
 class WebPlugin;
 class WebPluginContainer;
+class WebPrescientNetworking;
 class WebRTCPeerConnectionHandler;
 class WebRTCPeerConnectionHandlerClient;
 class WebSpeechSynthesizer;
 class WebSpeechSynthesizerClient;
 class WebThemeEngine;
 class WebURLRequest;
 struct WebPluginParams;
 struct WebURLError;
 }
 
@@ skipping 158 matching lines @@
                                       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();

[jam, 2013/06/03 16:41:28]

for WebKit classes that are implemented in src/chrome, we usually don't change
content APIs for them. instead we make chrome set the pointers for these classes
directly, i.e. see 
WebKit::WebAutofillClient
WebKit::WebPrerendererClient
WebKit::WebSpellCheckClient
as some examples, and ChromeContentRendererClient::RenderViewCreated which adds
the chrome implementations at runtime

   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,
                                       std::string* cookies);
@@ skipping 24 matching lines @@
       int render_view_id,
       SynchronousCompositor* compositor) {}
 
   // Allow the embedder to disable input event filtering by the compositor.
   virtual bool ShouldCreateCompositorInputHandler() const;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_