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

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index 66b45649872811a124487e67c268cd0143f5d858..79f1a1642037141c8d69d6b622b663d5873d66c9 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -27,6 +27,7 @@
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/crash_keys.h"
 #include "chrome/common/pepper_permission_util.h"
+#include "chrome/common/prerender_types.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/secure_origin_whitelist.h"
 #include "chrome/common/url_constants.h"
@@ -1146,6 +1147,13 @@ bool ChromeContentRendererClient::WillSendRequest(
   return false;
 }
 
+bool ChromeContentRendererClient::IsPrefetchOnly(
+    content::RenderFrame* render_frame,
+    const blink::WebURLRequest& request) {
+  return prerender::PrerenderHelper::GetPrerenderMode(render_frame) ==
+         prerender::PREFETCH_ONLY;
+}
+
 unsigned long long ChromeContentRendererClient::VisitedLinkHash(
     const char* canonical_url, size_t length) {
   return visited_link_slave_->ComputeURLFingerprint(canonical_url, length);