Remove a chrome dependency by removing Prerender from ResourceDispatcherHost.

chrome/browser/prerender/prerender_tracker.cc

Index: chrome/browser/prerender/prerender_tracker.cc
diff --git a/chrome/browser/prerender/prerender_tracker.cc b/chrome/browser/prerender/prerender_tracker.cc
index f191e8c9a41327e6de19825d8a9ab89108b4270b..77d220edb8198a558d9488dd3132184b2bfa7139 100644
--- a/chrome/browser/prerender/prerender_tracker.cc
+++ b/chrome/browser/prerender/prerender_tracker.cc
@@ -3,44 +3,29 @@
 // found in the LICENSE file.
 
 #include "base/logging.h"
+#include "chrome/browser/browser_process.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "content/browser/browser_thread.h"
+#include "content/browser/resource_context.h"
+#include "content/common/resource_messages.h"
+#include "net/base/load_flags.h"
 
 namespace prerender {
 
-namespace {
-
-void DestroyPreloadForRenderView(
-    const base::WeakPtr<PrerenderManager>& prerender_manager_weak_ptr,
-    int child_id,
-    int route_id,
-    FinalStatus final_status) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  PrerenderManager* prerender_manager = prerender_manager_weak_ptr.get();
-  if (!prerender_manager)
-    return;
-
-  prerender_manager->DestroyPreloadForChildRouteIdPair(
-      std::make_pair(child_id, route_id),
-      final_status);
-}
-
-}  // namespace
-
-struct RenderViewInfo {
-  explicit RenderViewInfo(PrerenderManager* prerender_manager)
+PrerenderTracker::RenderViewInfo::RenderViewInfo(
+    PrerenderManager* prerender_manager)
       : final_status(FINAL_STATUS_MAX),
         prerender_manager(prerender_manager->AsWeakPtr()) {
-  }
+}
 
-  FinalStatus final_status;
-  base::WeakPtr<PrerenderManager> prerender_manager;
-};
+PrerenderTracker::RenderViewInfo::~RenderViewInfo() {
+}
 
-// static
-PrerenderTracker* PrerenderTracker::GetInstance() {
-  return Singleton<PrerenderTracker>::get();
+PrerenderTracker::PrerenderTracker() {
+}
+
+PrerenderTracker::~PrerenderTracker() {
 }
 
 bool PrerenderTracker::TryUse(int child_id, int route_id) {
@@ -74,15 +59,6 @@ bool PrerenderTracker::TryCancelOnIOThread(
   return TryCancel(child_id, route_id, final_status);
 }
 
-bool PrerenderTracker::IsPrerenderingOnIOThread(int child_id,
-                                                int route_id) const {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-
-  ChildRouteIdPair child_route_id_pair(child_id, route_id);
-  return possibly_prerendering_io_thread_set_.end() !=
-         possibly_prerendering_io_thread_set_.find(child_route_id_pair);
-}
-
 bool PrerenderTracker::GetFinalStatus(int child_id, int route_id,
                                       FinalStatus* final_status) const {
   ChildRouteIdPair child_route_id_pair(child_id, route_id);
@@ -118,12 +94,6 @@ void PrerenderTracker::OnPrerenderingStarted(
       std::make_pair(child_route_id_pair, RenderViewInfo(prerender_manager)));
 }
 
-PrerenderTracker::PrerenderTracker() {
-}
-
-PrerenderTracker::~PrerenderTracker() {
-}
-
 void PrerenderTracker::OnPrerenderingFinished(int child_id, int route_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK_GE(child_id, 0);
@@ -180,6 +150,15 @@ bool PrerenderTracker::SetFinalStatus(int child_id, int route_id,
   return false;
 }
 
+bool PrerenderTracker::IsPrerenderingOnIOThread(int child_id,
+                                                int route_id) const {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  ChildRouteIdPair child_route_id_pair(child_id, route_id);
+  return possibly_prerendering_io_thread_set_.end() !=
+         possibly_prerendering_io_thread_set_.find(child_route_id_pair);
+}
+
 void PrerenderTracker::AddPrerenderOnIOThread(
     const ChildRouteIdPair& child_route_id_pair) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
@@ -201,13 +180,15 @@ void PrerenderTracker::RemovePrerenderOnIOThread(
 // static
 void PrerenderTracker::AddPrerenderOnIOThreadTask(
     const ChildRouteIdPair& child_route_id_pair) {
-  GetInstance()->AddPrerenderOnIOThread(child_route_id_pair);
+  g_browser_process->prerender_tracker()->AddPrerenderOnIOThread(
+      child_route_id_pair);
 }
 
 // static
 void PrerenderTracker::RemovePrerenderOnIOThreadTask(
     const ChildRouteIdPair& child_route_id_pair) {
-  GetInstance()->RemovePrerenderOnIOThread(child_route_id_pair);
+  g_browser_process->prerender_tracker()->RemovePrerenderOnIOThread(
+      child_route_id_pair);
 }
 
 }  // namespace prerender