Remove a chrome dependency by removing Prerender from ResourceDispatcherHost.

chrome/browser/prerender/prerender_contents.cc

Index: chrome/browser/prerender/prerender_contents.cc
diff --git a/chrome/browser/prerender/prerender_contents.cc b/chrome/browser/prerender/prerender_contents.cc
index ac050f17af16212f4603296080fb1fd4164af869..ade0457bfb879722ad3f032690264829f9f9f2bd 100644
--- a/chrome/browser/prerender/prerender_contents.cc
+++ b/chrome/browser/prerender/prerender_contents.cc
@@ -31,6 +31,7 @@
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/resource_dispatcher_host.h"
 #include "content/browser/renderer_host/resource_request_details.h"
+#include "content/browser/resource_context.h"
 #include "content/browser/site_instance.h"
 #include "content/browser/tab_contents/tab_contents_delegate.h"
 #include "content/browser/tab_contents/tab_contents_view.h"
@@ -186,8 +187,10 @@ void PrerenderContents::StartPrerenderingOld(
   // Register this with the PrerenderTracker as a prerendering RenderViewHost.
   // This must be done before the Navigate message to catch all resource
   // requests.
-  PrerenderTracker::GetInstance()->OnPrerenderingStarted(child_id_, route_id_,
-                                                         prerender_manager_);
+  g_browser_process->prerender_tracker()->OnPrerenderingStarted(
+      child_id_,
+      route_id_,
+      prerender_manager_);
 
   // Close ourselves when the application is shutting down.
   notification_registrar_.Add(this, NotificationType::APP_TERMINATING,
@@ -290,8 +293,10 @@ void PrerenderContents::StartPrerendering(
   // RenderViewHost. This must be done before the Navigate message to catch all
   // resource requests, but as it is on the same thread as the Navigate message
   // (IO) there is no race condition.
-  PrerenderTracker::GetInstance()->OnPrerenderingStarted(child_id_, route_id_,
-                                                         prerender_manager_);
+  g_browser_process->prerender_tracker()->OnPrerenderingStarted(
+      child_id_,
+      route_id_,
+      prerender_manager_);
 
   // Close ourselves when the application is shutting down.
   notification_registrar_.Add(this, NotificationType::APP_TERMINATING,
@@ -377,7 +382,7 @@ PrerenderContents::~PrerenderContents() {
     render_view_host_->Shutdown();
 
   if (child_id_ != -1 && route_id_ != -1) {
-    PrerenderTracker::GetInstance()->OnPrerenderingFinished(
+    g_browser_process->prerender_tracker()->OnPrerenderingFinished(
         child_id_, route_id_);
   }
 
@@ -720,15 +725,14 @@ void PrerenderContents::Destroy(FinalStatus final_status) {
     // because destroy may be called directly from the UI thread without calling
     // TryCancel().  This is difficult to completely avoid, since prerendering
     // can be cancelled before a RenderView is created.
-    bool is_cancelled =
-        PrerenderTracker::GetInstance()->TryCancel(child_id_, route_id_,
-                                                   final_status);
+    bool is_cancelled = g_browser_process->prerender_tracker()->TryCancel(
+        child_id_, route_id_, final_status);
     CHECK(is_cancelled);
 
     // A different final status may have been set already from another thread.
     // If so, use it instead.
-    if (!PrerenderTracker::GetInstance()->GetFinalStatus(child_id_, route_id_,
-                                                         &final_status)) {
+    if (!g_browser_process->prerender_tracker()->GetFinalStatus(
+            child_id_, route_id_, &final_status)) {
       NOTREACHED();
     }
   }