Always call WasShown() before trying to paint.

chrome/browser/instant/instant_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "base/stringprintf.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/history/history.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/instant/instant_controller.h"
@@ skipping 565 matching lines @@
   // is sent, since query hasn't changed.
   SetOmniboxText("search");
   EXPECT_TRUE(instant()->GetPreviewContents());
   EXPECT_TRUE(instant()->IsCurrent());
   EXPECT_TRUE(instant()->is_showing());
   EXPECT_TRUE(UpdateSearchState(instant()->GetPreviewContents()));
   EXPECT_EQ(2, onchangecalls_);
 }
 
 // Test that Instant can't be fooled into committing a URL.
-// Disabled: http://crbug.com/143207
-IN_PROC_BROWSER_TEST_F(InstantTest, DISABLED_DoesNotCommitURLs) {
+IN_PROC_BROWSER_TEST_F(InstantTest, DoesNotCommitURLs) {
   ASSERT_NO_FATAL_FAILURE(SetupInstant("instant.html"));
   EXPECT_TRUE(ui_test_utils::BringBrowserWindowToFront(browser()));
 
   // Type a URL. No Instant.
   SetOmniboxText("http://deadly/nadder");
   EXPECT_FALSE(instant()->GetPreviewContents());
 
   // Unfocus and refocus the omnibox.
   ui_test_utils::ClickOnView(browser(), VIEW_ID_TAB_CONTAINER);
   EXPECT_TRUE(ui_test_utils::IsViewFocused(browser(), VIEW_ID_TAB_CONTAINER));
@@ skipping 221 matching lines @@
   content::WindowedNotificationObserver observer(
       chrome::NOTIFICATION_INSTANT_CONTROLLER_HIDDEN,
       content::NotificationService::AllSources());
   chrome::NewEmptyWindow(browser()->profile());
   observer.Wait();
   EXPECT_TRUE(instant()->GetPreviewContents());
   EXPECT_FALSE(instant()->IsCurrent());
   EXPECT_FALSE(instant()->is_showing());
 }
 #endif