Disable a test that fails on mac. I enabled this in r14684, but

chrome/test/automation/automation_proxy_uitest.cc

 // Copyright (c) 2006-2008 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 <string>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/string_util.h"
 #include "build/build_config.h"
@@ skipping 383 matching lines @@
     file_util::AppendToPath(&document2_, L"title2.html");
     launch_arguments_ = CommandLine(L"");
     launch_arguments_.AppendLooseValue(document1_);
     launch_arguments_.AppendLooseValue(document2_);
   }
 
   std::wstring document1_;
   std::wstring document2_;
 };
 
+// TODO(port): Port to mac.
+#if defined(OS_WIN) || defined(OS_LINUX)
 TEST_F(AutomationProxyTest2, GetActiveTabIndex) {
   scoped_ptr<BrowserProxy> window(automation()->GetBrowserWindow(0));
   ASSERT_TRUE(window.get());
 
   int active_tab_index = -1;
   ASSERT_TRUE(window->GetActiveTabIndex(&active_tab_index));
   int tab_count;
   ASSERT_TRUE(window->GetTabCount(&tab_count));
   ASSERT_EQ(0, active_tab_index);
   int at_index = 1;
   ASSERT_TRUE(window->ActivateTab(at_index));
   ASSERT_TRUE(window->GetActiveTabIndex(&active_tab_index));
   ASSERT_EQ(at_index, active_tab_index);
 }
 
-// TODO(port): Port to mac.
-#if defined(OS_WIN) || defined(OS_LINUX)
 TEST_F(AutomationProxyTest2, GetTabTitle) {
   scoped_ptr<BrowserProxy> window(automation()->GetBrowserWindow(0));
   ASSERT_TRUE(window.get());
   scoped_ptr<TabProxy> tab(window->GetTab(0));
   ASSERT_TRUE(tab.get());
   std::wstring title;
   ASSERT_TRUE(tab->GetTabTitle(&title));
   ASSERT_STREQ(L"title1.html", title.c_str());
 
   tab.reset(window->GetTab(1));
@@ skipping 728 matching lines @@
 
   // Allow some time for the popup to show up and close.
   PlatformThread::Sleep(2000);
 
   std::wstring expected(L"string");
   std::wstring jscript = CreateJSString(L"\"" + expected + L"\"");
   std::wstring actual;
   ASSERT_TRUE(tab->ExecuteAndExtractString(L"", jscript, &actual));
   ASSERT_STREQ(expected.c_str(), actual.c_str());
 }