Remove a chrome dependency by removing Prerender from ResourceDispatcherHost.

chrome/test/testing_browser_process.cc

Index: chrome/test/testing_browser_process.cc
diff --git a/chrome/test/testing_browser_process.cc b/chrome/test/testing_browser_process.cc
index f6d265e7c08ccb6e758afec2bf0e6a05f515b1b5..b4b1594d476b5882fa4004ce91981394103e6129 100644
--- a/chrome/test/testing_browser_process.cc
+++ b/chrome/test/testing_browser_process.cc
@@ -13,6 +13,7 @@
 #include "chrome/browser/policy/configuration_policy_provider.h"
 #include "chrome/browser/policy/dummy_configuration_policy_provider.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/profiles/profile_manager.h"
 #include "net/url_request/url_request_context_getter.h"
@@ -236,6 +237,12 @@ ChromeNetLog* TestingBrowserProcess::net_log() {
   return NULL;
 }
 
+prerender::PrerenderTracker* TestingBrowserProcess::prerender_tracker() {
+  if (!prerender_tracker_.get())
+    prerender_tracker_.reset(new prerender::PrerenderTracker());
+  return prerender_tracker_.get();
+}
+
 void TestingBrowserProcess::SetLocalState(PrefService* local_state) {
   local_state_ = local_state;
 }