Disable the failing UI test. I filed a P1 bug on it.

chrome/browser/unload_uitest.cc

 // Copyright (c) 2006-2009 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 "app/message_box_flags.h"
 #include "base/file_util.h"
 #include "base/platform_thread.h"
 #include "chrome/browser/automation/url_request_mock_http_job.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/automation/browser_proxy.h"
@@ skipping 309 matching lines @@
   LoadUrlAndQuitBrowser(TWO_SECOND_UNLOAD_ALERT_HTML, L"twosecondunloadalert");
 }
 
 // Tests closing the browser with a beforeunload handler that takes
 // two seconds to run then pops up an alert.
 TEST_F(UnloadTest, BrowserCloseTwoSecondBeforeUnloadAlert) {
   LoadUrlAndQuitBrowser(TWO_SECOND_BEFORE_UNLOAD_ALERT_HTML,
                         L"twosecondbeforeunloadalert");
 }
 
+// TODO(brettw) bug 12913 this test was broken by WebKit merge 42202:44252.
+// Apparently popup titles are broken somehow.
+#if 0
+
 // Tests that if there's a renderer process with two tabs, one of which has an
 // unload handler, and the other doesn't, the tab that doesn't have an unload
 // handler can be closed.  If this test fails, the Close() call will hang.
 TEST_F(UnloadTest, BrowserCloseTabWhenOtherTabHasListener) {
   NavigateToDataURL(CLOSE_TAB_WHEN_OTHER_TAB_HAS_LISTENER, L"only_one_unload");
   int window_count;
   automation()->GetBrowserWindowCount(&window_count);
   ASSERT_EQ(2, window_count);
 
   scoped_ptr<BrowserProxy> popup_browser_proxy(
@@ skipping 15 matching lines @@
   int main_tab_count;
   EXPECT_TRUE(main_browser_proxy->GetTabCount(&main_tab_count));
   EXPECT_EQ(1, main_tab_count);
   scoped_ptr<TabProxy> main_tab(main_browser_proxy->GetActiveTab());
   std::wstring main_title;
   ASSERT_TRUE(main_tab.get() != NULL);
   EXPECT_TRUE(main_tab->GetTabTitle(&main_title));
   EXPECT_EQ(std::wstring(L"only_one_unload"), main_title);
 }
 
+#endif
+
 // TODO(ojan): Add tests for unload/beforeunload that have multiple tabs
 // and multiple windows.