Remove a chrome dependency by removing Prerender from ResourceDispatcherHost.

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index 958f805d366558b7c2862123cf10dd49485b3bc8..51bae3b42b0be521f13db4fbc594c290983a24e9 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -45,6 +45,7 @@
 #include "chrome/browser/policy/browser_policy_connector.h"
 #include "chrome/browser/prefs/browser_prefs.h"
 #include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/browser/printing/background_printing_manager.h"
 #include "chrome/browser/printing/print_job_manager.h"
 #include "chrome/browser/printing/print_preview_tab_controller.h"
@@ -694,6 +695,10 @@ ChromeNetLog* BrowserProcessImpl::net_log() {
   return net_log_.get();
 }
 
+prerender::PrerenderTracker* BrowserProcessImpl::prerender_tracker() {
+  return prerender_tracker_.get();
+}
+
 void BrowserProcessImpl::ClearLocalState(const FilePath& profile_path) {
   webkit_database::DatabaseTracker::ClearLocalState(profile_path);
   BrowsingDataRemover::ClearGearsData(profile_path);
@@ -730,6 +735,9 @@ void BrowserProcessImpl::CreateResourceDispatcherHost() {
   resource_dispatcher_host_.reset(
       new ResourceDispatcherHost(resource_queue_delegates));
   resource_dispatcher_host_->Initialize();
+
+  prerender_tracker_.reset(new prerender::PrerenderTracker);

[jam, 2011/05/24 05:36:23]

we're going to use the one ResourceDispatcher::Observer to remove a lot of
depenendencies, not just the prerender ones.  so there should be a generically
named ResourceDispatcherHostObserver in the Chrome directory.

[dominich, 2011/05/24 15:10:28]

Done.

+  resource_dispatcher_host_->set_observer(prerender_tracker_.get());
 }
 
 void BrowserProcessImpl::CreateMetricsService() {