Move instant support to SearchTabHelper.

chrome/browser/ui/search/instant_extended_interactive_uitest.cc

Index: chrome/browser/ui/search/instant_extended_interactive_uitest.cc
diff --git a/chrome/browser/ui/search/instant_extended_interactive_uitest.cc b/chrome/browser/ui/search/instant_extended_interactive_uitest.cc
index ad933c915e3710b15c15efd7b665597984bd9ab2..dd925cd90603565e26e2c80183b7c32f5fcf6db1 100644
--- a/chrome/browser/ui/search/instant_extended_interactive_uitest.cc
+++ b/chrome/browser/ui/search/instant_extended_interactive_uitest.cc
@@ -365,13 +365,15 @@ IN_PROC_BROWSER_TEST_F(InstantExtendedTest, MAYBE_UsesOverlayIfTabNotReady) {
   ASSERT_NO_FATAL_FAILURE(SetupInstant(browser()));
   FocusOmniboxAndWaitForInstantOverlayAndNTPSupport();
 
-  // Open a new tab and start typing before InstantTab is properly hooked up.
-  // Should use the overlay.
+  // Open a new tab and navigate to instant URL. Start typing before InstantTab
+  // is properly hooked up. Should use the overlay.
   ui_test_utils::NavigateToURLWithDisposition(
       browser(),
-      GURL(chrome::kChromeUINewTabURL),
-      NEW_FOREGROUND_TAB,
-      ui_test_utils::BROWSER_TEST_WAIT_FOR_TAB);
+      instant_url(),
+      NEW_BACKGROUND_TAB,
+      ui_test_utils::BROWSER_TEST_NONE);
+  EXPECT_EQ(2, browser()->tab_strip_model()->count());
+  browser()->tab_strip_model()->ActivateTabAt(1, false);
   ASSERT_TRUE(SetOmniboxTextAndWaitForOverlayToShow("query"));
 
   // But Instant tab should still exist.