Instant interactive_ui_tests should wait for main frame load.

chrome/browser/ui/search/instant_test_utils.cc

Index: chrome/browser/ui/search/instant_test_utils.cc
diff --git a/chrome/browser/ui/search/instant_test_utils.cc b/chrome/browser/ui/search/instant_test_utils.cc
index 12aded316de0df22d4de0a691cc38c2569022165..a17425d906849cb54484e6ba042a8a99c17b86a2 100644
--- a/chrome/browser/ui/search/instant_test_utils.cc
+++ b/chrome/browser/ui/search/instant_test_utils.cc
@@ -118,6 +118,14 @@ void InstantTestBase::PressEnterAndWaitForNavigation() {
   nav_observer.Wait();
 }
 
+void InstantTestBase::PressEnterAndWaitForFrameLoad() {
+  content::WindowedNotificationObserver nav_observer(
+      content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
+      content::NotificationService::AllSources());
+  browser_->window()->GetLocationBar()->AcceptInput();
+  nav_observer.Wait();
+}
+
 bool InstantTestBase::GetBoolFromJS(content::WebContents* contents,
                                     const std::string& script,
                                     bool* result) {