Build selenium tests on the bots. This test is running on the webkit.org xp perf bot.

Review URL: http://codereview.chromium.org/1621007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@43918 0039d316-1c4b-4281-b951-d872f2087c98

build/all.gyp

@@ -202,6 +202,7 @@
             '../chrome/chrome.gyp:nacl_ui_tests',
             '../chrome/chrome.gyp:page_cycler_tests',
             '../chrome/chrome.gyp:plugin_tests',
+            '../chrome/chrome.gyp:selenium_tests',
             '../chrome/chrome.gyp:startup_tests',
             '../chrome/chrome.gyp:sync_unit_tests',
             '../chrome/chrome.gyp:tab_switching_test',