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

chrome/browser/unload_uitest.cc

Index: chrome/browser/unload_uitest.cc
===================================================================
--- chrome/browser/unload_uitest.cc	(revision 17041)
+++ chrome/browser/unload_uitest.cc	(working copy)
@@ -327,6 +327,10 @@
                         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.
@@ -362,5 +366,7 @@
   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.