Remove PrerenderResourceThrottle and related infrastructure.

chrome/browser/prerender/prerender_resource_throttle.cc

-// Copyright (c) 2012 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.
-
-#include "chrome/browser/prerender/prerender_resource_throttle.h"
-
-#include "base/bind.h"
-#include "chrome/browser/prerender/prerender_tracker.h"
-#include "content/public/browser/resource_throttle_controller.h"
-#include "net/url_request/url_request.h"
-
-namespace prerender {
-
-PrerenderResourceThrottle::PrerenderResourceThrottle(
-    PrerenderTracker* prerender_tracker,
-    const net::URLRequest* request,
-    int child_id,
-    int route_id)
-    : prerender_tracker_(prerender_tracker),
-      request_(request),
-      child_id_(child_id),
-      route_id_(route_id) {
-}
-
-PrerenderResourceThrottle::~PrerenderResourceThrottle() {
-}
-
-void PrerenderResourceThrottle::WillStartRequest(bool* defer) {
-  *defer = prerender_tracker_->PotentiallyDelayRequestOnIOThread(
-      request_->url(), child_id_, route_id_,
-      base::Bind(&PrerenderResourceThrottle::ContinueRequest, AsWeakPtr()));
-}
-
-void PrerenderResourceThrottle::ContinueRequest(bool proceed) {
-  if (proceed) {
-    controller()->Resume();
-  } else {
-    controller()->Cancel();
-  }
-}
-
-}  // namespace prerender