Revert of [NoStatePrefetch] Kill renderer after preload scanning

chrome/renderer/prerender/prerender_dispatcher.cc

Index: chrome/renderer/prerender/prerender_dispatcher.cc
diff --git a/chrome/renderer/prerender/prerender_dispatcher.cc b/chrome/renderer/prerender/prerender_dispatcher.cc
index ab357792c7c68faae5cf26fc2d73f35dd409558d..1ef433009becb2513872df90e3723d1fde101dca 100644
--- a/chrome/renderer/prerender/prerender_dispatcher.cc
+++ b/chrome/renderer/prerender/prerender_dispatcher.cc
@@ -171,7 +171,7 @@
   // been canceled before it was started), so release it to avoid a
   // leak. Moreover, if it did, the PrerenderClient in Blink will have been
   // detached already.
-  prerenders_.erase(extra_data.prerender_id());
+   prerenders_.erase(extra_data.prerender_id());
 }
 
 void PrerenderDispatcher::abandon(const WebPrerender& prerender) {
@@ -186,8 +186,4 @@
   prerenders_.erase(extra_data.prerender_id());
 }
 
-void PrerenderDispatcher::prefetchFinished() {
-  content::RenderThread::Get()->Send(new PrerenderHostMsg_PrefetchFinished());
-}
-
 }  // namespace prerender