Change warning message text to say "Warning:" instead of "Error:".
Change warning message text to say "Warning:" instead of "Error:".

Review URL: http://groups.google.com/a/chromium.org/group/chromium-dev/msg/6e8091c1f8fd0ce8?utoken=7YmuEiwAAADKmxESkJs-f9AG1R_s5geJZhKQRvnTFwSurEj8RIwV1AWE92CDxplApwvHNpCDhzU
Review URL: http://codereview.chromium.org/7983004

csulmone/gyp,csulmone/gyp,csulmone/gyp,csulmone/gyp