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When the target window was closed, new window commands will trigger reconnection to DevTools.
Thus, the original message is misleading.

BUG=none

Review URL: https://chromiumcodereview.appspot.com/23734005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@222100 0039d316-1c4b-4281-b951-d872f2087c98