Fix "Unable to bind to port" message when wifi is disabled.
Fix "Unable to bind to port" message when wifi is disabled.

Instead, display that you are bound to localhost, which is perfectly
fine for deploying via USB.

guozanhua/chrome-app-developer-tool,guozanhua/chrome-app-developer-tool,guozanhua/chrome-app-developer-tool,guozanhua/chrome-app-developer-tool