Remove chromium EWS support, and fix broken test.
https://bugs.webkit.org/show_bug.cgi?id=114221

Reviewed by Ryosuke Niwa.

* Scripts/webkitpy/tool/commands/earlywarningsystem.py:
(AbstractChromiumEWS): Removed.
(ChromiumLinuxEWS): Removed.
(ChromiumLinuxDebugEWS): Removed.
(ChromiumWindowsEWS): Removed.
(ChromiumAndroidEWS): Removed.
* Scripts/webkitpy/tool/commands/earlywarningsystem_unittest.py:
(EarlyWarningSystemTest): Fix misspelled class name.
(test_ewses): Fix entry point name to ensure test is run.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147966 268f45cc-cd09-0410-ab3c-d52691b4dbfc