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

content/child/web_url_request_util.cc

Index: content/child/web_url_request_util.cc
diff --git a/content/child/web_url_request_util.cc b/content/child/web_url_request_util.cc
index 267a9575475fcf68c0ac86a7ed3f5674cf8347b6..51830c388fc82894eaf085e36dc777c19276fb24 100644
--- a/content/child/web_url_request_util.cc
+++ b/content/child/web_url_request_util.cc
@@ -11,6 +11,7 @@
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
+#include "content/child/request_extra_data.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
 #include "third_party/WebKit/public/platform/FilePathConversion.h"
@@ -217,6 +218,13 @@ int GetLoadFlagsForWebURLRequest(const blink::WebURLRequest& request) {
   if (!request.allowStoredCredentials())
     load_flags |= net::LOAD_DO_NOT_SEND_AUTH_DATA;
 
+  if (request.getExtraData()) {
+    RequestExtraData* extra_data =
+        static_cast<RequestExtraData*>(request.getExtraData());
+    if (extra_data->is_prefetch())
+      load_flags |= net::LOAD_PREFETCH;
+  }
+
   return load_flags;
 }