Turn off safebrowsing for PREFETCH requests

content/browser/renderer_host/resource_dispatcher_host.cc

 // Copyright (c) 2011 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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/renderer_host/resource_dispatcher_host.h"
 
 #include <set>
 #include <vector>
@@ skipping 1167 matching lines @@
                                            bool from_renderer) {
   PendingRequestList::iterator i = pending_requests_.find(
       GlobalRequestID(child_id, request_id));
   if (i == pending_requests_.end()) {
     // We probably want to remove this warning eventually, but I wanted to be
     // able to notice when this happens during initial development since it
     // should be rare and may indicate a bug.
     DLOG(WARNING) << "Canceling a request that wasn't found";
     return;
   }
-  CancelRequestInternal(i->second, from_renderer);
+  net::URLRequest* request = i->second;
+  const bool started_before_cancel = request->is_pending();
+  CancelRequestInternal(request, from_renderer);
+  // If the request isn't in flight, then we won't get asyncronous notification,
+  // so we have to signal ourselves to finish this request.
+  if (!started_before_cancel)
+    OnResponseCompleted(request);
 }
 
 void ResourceDispatcherHost::CancelRequestInternal(net::URLRequest* request,
                                                    bool from_renderer) {
   VLOG(1) << "CancelRequest: " << request->url().spec();
 
   // WebKit will send us a cancel for downloads since it no longer handles them.
   // In this case, ignore the cancel since we handle downloads in the browser.
   ResourceDispatcherHostRequestInfo* info = InfoForRequest(request);
   if (!from_renderer || !info->is_download()) {
@@ skipping 753 matching lines @@
   return is_prefetch_enabled_;
 }
 
 // static
 void ResourceDispatcherHost::set_is_prefetch_enabled(bool value) {
   is_prefetch_enabled_ = value;
 }
 
 // static
 bool ResourceDispatcherHost::is_prefetch_enabled_ = false;