content: Move all listeners of NOTIFICATION_RENDER_VIEW_HOST_CREATED out of content.

chrome/test/base/in_process_browser_test.cc

Index: chrome/test/base/in_process_browser_test.cc
diff --git a/chrome/test/base/in_process_browser_test.cc b/chrome/test/base/in_process_browser_test.cc
index 18f439e1407b46fadf9af6f1f046b72da7a725b7..53aad1cf8593484e5753c38da6e0cb8264d63776 100644
--- a/chrome/test/base/in_process_browser_test.cc
+++ b/chrome/test/base/in_process_browser_test.cc
@@ -219,7 +219,7 @@ void InProcessBrowserTest::AddTabAtIndexToBrowser(
     const GURL& url,
     content::PageTransition transition) {
   content::TestNavigationObserver observer(
-      content::NotificationService::AllSources(), NULL, 1);
+      content::NotificationService::AllSources(), 1);
 
   chrome::NavigateParams params(browser, url, transition);
   params.tabstrip_index = index;