Trap exceptions calling getDaemonConfig on ChromeOS.

BUG=None
TEST=Manual

Review URL: https://chromiumcodereview.appspot.com/10198006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133605 0039d316-1c4b-4281-b951-d872f2087c98

remoting/webapp/host_controller.js

@@ -319,7 +319,12 @@ remoting.HostController.prototype.onHostListRefresh =
     }
     onDone();
   };
-  this.plugin_.getDaemonConfig(onConfig);
+  try {
+    this.plugin_.getDaemonConfig(onConfig);
+  } catch (err) {
+    this.setHost(null);
+    onDone();
+  }
 };
 
 /** @type {remoting.HostController} */