Add a mode to ensure a server is not already running.

BUG=128770
TEST=local positive, negative, and no argument.

Review URL: https://chromiumcodereview.appspot.com/10409035

Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 14240b3aaf02da328ecb70031ab3f3c9fc2eee43
1 file changed
tree: 850697c64363937abb6a1670de06ea018f0c220c
  1. xdisplaycheck.cc
  2. xdisplaycheck.gyp