Check for existence of testing channel even if ProxyLauncher is not launching Chrome, because it is still possible that Chrome is not ready to accept connections.
Check for existence of testing channel even if ProxyLauncher is not launching Chrome, because it is still possible that Chrome is not ready to accept connections.

BUG=72364
TEST=none
STATUS=fixed

Review URL: http://codereview.chromium.org/6456002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@74206 0039d316-1c4b-4281-b951-d872f2087c98

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