Remove PrerenderResourceThrottle and related infrastructure.

chrome/browser/prerender/prerender_tracker.cc

Index: chrome/browser/prerender/prerender_tracker.cc
diff --git a/chrome/browser/prerender/prerender_tracker.cc b/chrome/browser/prerender/prerender_tracker.cc
index 185e9678042d149ff0167dfd9fd1679fd7174bf5..ccdcbffcfe5130a5e91474f7640558a7ed67c052 100644
--- a/chrome/browser/prerender/prerender_tracker.cc
+++ b/chrome/browser/prerender/prerender_tracker.cc
@@ -40,16 +40,6 @@ bool ShouldCancelRequest(
           prerender_manager->IsOldRenderViewHost(render_view_host));
 }
 
-void HandleDelayedRequestOnUIThread(
-    int child_id,
-    int route_id,
-    const PrerenderTracker::CheckURLCallback& callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  bool should_cancel = ShouldCancelRequest(child_id, route_id);
-  BrowserThread::PostTask(
-      BrowserThread::IO, FROM_HERE, base::Bind(callback, !should_cancel));
-}
-
 void DestroyPrerenderForRenderViewOnUI(
     const base::WeakPtr<PrerenderManager>& prerender_manager_weak_ptr,
     int render_process_id,
@@ -169,22 +159,6 @@ bool PrerenderTracker::TryCancelOnIOThread(
   return TryCancel(child_id, route_id, final_status);
 }
 
-bool PrerenderTracker::PotentiallyDelayRequestOnIOThread(
-    const GURL& gurl,
-    int process_id,
-    int route_id,
-    const CheckURLCallback& callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  if (!url_counter_.MatchesURL(gurl))
-    return false;
-  BrowserThread::PostTask(
-      BrowserThread::UI,
-      FROM_HERE,
-      base::Bind(&HandleDelayedRequestOnUIThread, process_id, route_id,
-                 callback));
-  return true;
-}
-
 void PrerenderTracker::AddPrerenderURLOnUIThread(const GURL& url) {
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE, base::Bind(&AddURL, url, &url_counter_));