Add ExternalPrerenderRequestHandler and related API

chrome/browser/prerender/prerender_manager.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_manager.h"
 
 #include <algorithm>
 #include <functional>
 #include <string>
 #include <vector>
@@ skipping 374 matching lines @@
 }
 
 PrerenderHandle* PrerenderManager::AddPrerenderFromLocalPredictor(
     const GURL& url,
     SessionStorageNamespace* session_storage_namespace,
     const gfx::Size& size) {
   return AddPrerender(ORIGIN_LOCAL_PREDICTOR, -1, url, content::Referrer(),
                       size, session_storage_namespace);
 }
 
+PrerenderHandle* PrerenderManager::AddPrerenderFromExternalRequest(
+    const GURL& url,
+    const content::Referrer& referrer,
+    SessionStorageNamespace* session_storage_namespace,
+    const gfx::Size& size) {
+  return AddPrerender(ORIGIN_EXTERNAL_REQUEST, -1, url, referrer, size,
+                      session_storage_namespace);
+}
+
 void PrerenderManager::DestroyPrerenderForRenderView(
     int process_id, int view_id, FinalStatus final_status) {
   DCHECK(CalledOnValidThread());
   if (PrerenderData* prerender_data =
           FindPrerenderDataForChildAndRoute(process_id, view_id)) {
     prerender_data->contents()->Destroy(final_status);
   }
 }
 
 void PrerenderManager::CancelAllPrerenders() {
@@ skipping 1174 matching lines @@
     logged_in_state_->erase(domain_key);
 }
 
 void PrerenderManager::LoggedInPredictorDataReceived(
     scoped_ptr<LoggedInStateMap> new_map) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   logged_in_state_.swap(new_map);
 }
 
 }  // namespace prerender