[NoStatePrefetch] Do not send responses to renderer in prefetch mode.

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 <stddef.h>
 
 #include <map>
@@ skipping 230 matching lines @@
                           bool* send_referrer);
 
   // Notifies the embedder that the given frame is requesting the resource at
   // |url|.  If the function returns true, the url is changed to |new_url|.
   virtual bool WillSendRequest(blink::WebFrame* frame,
                                ui::PageTransition transition_type,
                                const GURL& url,
                                const GURL& first_party_for_cookies,
                                GURL* new_url);
 
+  // Returns true if the request is associated with a document that is in
+  // ""prefetch only" mode, and will not be rendered.
+  virtual bool IsPrefetchOnly(RenderFrame* render_frame,
+                              const blink::WebURLRequest& request);
+
   // See blink::Platform.
   virtual unsigned long long VisitedLinkHash(const char* canonical_url,
                                              size_t length);
   virtual bool IsLinkVisited(unsigned long long link_hash);
   virtual blink::WebPrescientNetworking* GetPrescientNetworking();
   virtual bool ShouldOverridePageVisibilityState(
       const RenderFrame* render_frame,
       blink::WebPageVisibilityState* override_state);
 
   // Returns true if the given Pepper plugin is external (requiring special
@@ skipping 107 matching lines @@
       shell::InterfaceRegistry* interface_registry) {}
 
   // Overwrites the given URL to use an HTML5 embed if possible.
   // An empty URL is returned if the URL is not overriden.
   virtual GURL OverrideFlashEmbedWithHTML(const GURL& url);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_