Remove PrerenderInterceptor.

chrome/browser/prerender/prerender_interceptor.cc

-// Copyright (c) 2010 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_interceptor.h"
-
-#include <string>
-
-#include "base/logging.h"
-#include "chrome/browser/browser_thread.h"
-#include "chrome/browser/browser_process.h"
-#include "chrome/browser/io_thread.h"
-#include "googleurl/src/gurl.h"
-#include "net/base/load_flags.h"
-
-DISABLE_RUNNABLE_METHOD_REFCOUNT(PrerenderInterceptor);
-
-PrerenderInterceptor::PrerenderInterceptor()
-    : ALLOW_THIS_IN_INITIALIZER_LIST(
-        callback_(NewCallback(this,
-                              &PrerenderInterceptor::PrerenderDispatch))) {
-  net::URLRequest::RegisterRequestInterceptor(this);
-}
-
-PrerenderInterceptor::PrerenderInterceptor(
-    PrerenderInterceptorCallback* callback)
-  : callback_(callback) {
-    net::URLRequest::RegisterRequestInterceptor(this);
-}
-
-PrerenderInterceptor::~PrerenderInterceptor() {
-  net::URLRequest::UnregisterRequestInterceptor(this);
-}
-
-net::URLRequestJob* PrerenderInterceptor::MaybeIntercept(
-    net::URLRequest* request) {
-  return NULL;
-}
-
-net::URLRequestJob* PrerenderInterceptor::MaybeInterceptResponse(
-  net::URLRequest* request) {
-  // TODO(gavinp): unfortunately, we can't figure out the origin
-  // of this request here on systems where the referrer is blocked by
-  // configuration.
-
-  // TODO(gavinp): note that the response still might be intercepted
-  // by a later interceptor.  Should we write an interposing delegate
-  // and only prerender dispatch on requests that aren't intercepted?
-  // Or is this a slippery slope?
-
-  if (request->load_flags() & net::LOAD_PREFETCH) {
-    std::string mime_type;
-    request->GetMimeType(&mime_type);
-    if (mime_type == "text/html")
-      BrowserThread::PostTask(
-          BrowserThread::UI,
-          FROM_HERE,
-          NewRunnableMethod(this,
-                            &PrerenderInterceptor::RunCallbackFromUIThread,
-                            request->url()));
-  }
-  return NULL;
-}
-
-void PrerenderInterceptor::RunCallbackFromUIThread(const GURL& url) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  callback_->Run(url);
-}
-
-void PrerenderInterceptor::PrerenderDispatch(
-    const GURL& url) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  DVLOG(2) << "PrerenderDispatchOnUIThread: url=" << url;
-}
-