Disable failing search engine tests

BUG=70439

Review URL: http://codereview.chromium.org/6376007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72219 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/functional/PYAUTO_TESTS

@@ -67,6 +67,10 @@
       'search_engines',
       # crbug.com/67628
       '-search_engines.SearchEnginesTest.testTabToSearch',
+      # crbug.com/70439
+      '-search_engines.SearchEnginesTest.testAddSearchEngine',
+      '-search_engines.SearchEnginesTest.testEditSearchEngine',
+      '-search_engines.SearchEnginesTest.testSearchEngineSpecialChars',
       'special_tabs',
       # crbug.com/67851
       '-special_tabs.SpecialTabsTest.testAboutDNSTab',