**NOTFORLANDING** New link rel=prerender API

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.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/renderer_host/chrome_resource_dispatcher_host_delegate.h"
 
 #include "base/logging.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/download/download_request_limiter.h"
 #include "chrome/browser/download/download_resource_throttle.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/extensions/user_script_listener.h"
 #include "chrome/browser/external_protocol/external_protocol_handler.h"
 #include "chrome/browser/instant/instant_loader.h"
 #include "chrome/browser/net/load_timing_observer.h"
 #include "chrome/browser/prerender/prerender_manager.h"
-#include "chrome/browser/prerender/prerender_manager_factory.h"
 #include "chrome/browser/prerender/prerender_resource_throttle.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/browser/profiles/profile_io_data.h"
 #include "chrome/browser/renderer_host/chrome_url_request_user_data.h"
 #include "chrome/browser/renderer_host/safe_browsing_resource_throttle.h"
 #include "chrome/browser/renderer_host/transfer_navigation_resource_throttle.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/ui/auto_login_prompter.h"
 #include "chrome/browser/ui/login/login_prompt.h"
 #include "chrome/browser/ui/sync/one_click_signin_helper.h"
@@ skipping 15 matching lines @@
 #include "chrome/browser/renderer_host/offline_resource_throttle.h"
 #endif
 
 using content::BrowserThread;
 using content::RenderViewHost;
 using content::ResourceDispatcherHostLoginDelegate;
 using content::ResourceRequestInfo;
 
 namespace {
 
-void AddPrerenderOnUI(
-    int render_process_id, int render_view_id,
-    const GURL& url, const content::Referrer& referrer) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  prerender::PrerenderManager* prerender_manager =
-      prerender::FindPrerenderManagerUsingRenderProcessId(render_process_id);
-  if (!prerender_manager || !prerender_manager->is_enabled())
-    return;
-
-  prerender_manager->AddPrerenderFromLinkRelPrerender(render_process_id,
-                                                      render_view_id,
-                                                      url,
-                                                      referrer);
-}
-
 void NotifyDownloadInitiatedOnUI(int render_process_id, int render_view_id) {
   RenderViewHost* rvh = RenderViewHost::FromID(render_process_id,
                                                render_view_id);
   if (!rvh)
     return;
 
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_DOWNLOAD_INITIATED,
       content::Source<RenderViewHost>(rvh),
       content::NotificationService::NoDetails());
@@ skipping 27 matching lines @@
   if (resource_type == ResourceType::PREFETCH) {
     // All PREFETCH requests should be GETs, but be defensive about it.
     if (method != "GET")
       return false;
 
     // If prefetch is disabled, kill the request.
     if (!prerender::PrerenderManager::IsPrefetchEnabled())
       return false;
   }
 
-  // Handle a PRERENDER motivated request. Very similar to rel=prefetch, these
-  // rel=prerender requests instead launch an early render of the entire page.
-  if (resource_type == ResourceType::PRERENDER) {
-    if (prerender::PrerenderManager::IsPrerenderingPossible()) {
-      BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-          base::Bind(&AddPrerenderOnUI, child_id, route_id, url, referrer));
-    }
-    // Prerendering or not, this request should be aborted.
-    return false;
-  }
-
   // Abort any prerenders that spawn requests that use invalid HTTP methods.
   if (prerender_tracker_->IsPrerenderingOnIOThread(child_id, route_id) &&
       !prerender::PrerenderManager::IsValidHttpMethod(method)) {
     prerender_tracker_->TryCancelOnIOThread(
         child_id, route_id, prerender::FINAL_STATUS_INVALID_HTTP_METHOD);
     return false;
   }
 
   return true;
 }
@@ skipping 207 matching lines @@
 #if defined(ENABLE_ONE_CLICK_SIGNIN)
   const ResourceRequestInfo* info = ResourceRequestInfo::ForRequest(request);
 
   // See if the response contains the X-Google-Accounts-SignIn header.  If so,
   // then the user has just finished signing in, and the server is allowing the
   // browser to suggest connecting the user's profile to the account.
   OneClickSigninHelper::ShowInfoBarIfPossible(request, info->GetChildID(),
                                               info->GetRouteID());
 #endif
 }