New link rel=prerender api, using WebKit::WebPrerenderingPlatform

chrome/browser/prerender/prerender_link_manager_factory.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_link_manager_factory.h"
+
+#include "chrome/browser/prerender/prerender_link_manager.h"
+#include "chrome/browser/prerender/prerender_manager.h"
+#include "chrome/browser/prerender/prerender_manager_factory.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_dependency_manager.h"
+
+namespace prerender {
+
+// static
+PrerenderLinkManager* PrerenderLinkManagerFactory::GetForProfile(
+    Profile* profile) {
+  return static_cast<PrerenderLinkManager*>(
+      GetInstance()->GetServiceForProfile(profile, true));
+}
+
+// static
+PrerenderLinkManagerFactory* PrerenderLinkManagerFactory::GetInstance() {
+  return Singleton<PrerenderLinkManagerFactory>::get();
+}
+
+PrerenderLinkManagerFactory::PrerenderLinkManagerFactory()
+    : ProfileKeyedServiceFactory("PrerenderLinkmanager",
+                                 ProfileDependencyManager::GetInstance()) {
+  DependsOn(prerender::PrerenderManagerFactory::GetInstance());
+}
+
+ProfileKeyedService* PrerenderLinkManagerFactory::BuildServiceInstanceFor(
+    Profile* profile) const {
+  PrerenderManager* prerender_manager =
+      PrerenderManagerFactory::GetForProfile(profile);
+  if (!prerender_manager)
+    return NULL;
+  PrerenderLinkManager* prerender_link_manager =
+      new PrerenderLinkManager(prerender_manager);
+  return prerender_link_manager;
+}
+
+bool PrerenderLinkManagerFactory::ServiceHasOwnInstanceInIncognito() {

[dominich, 2012/04/27 21:52:01]

Is there a reason why the link manager instance can't be shared between normal
and incognito profiles? 

[gavinp, 2012/04/27 23:31:45]

Well, two reasons.  Firstly, the PrerenderManager isn't shared, and it has a
link to one.  Secondly, if the same URL was prerendered by link from each type
of session, they'd interact with each other.

+  return true;
+}
+
+}  // namespace prerender