Protect all uses of JSON.parse against exceptions.

remoting/webapp/client_plugin_async.js

Index: remoting/webapp/client_plugin_async.js
diff --git a/remoting/webapp/client_plugin_async.js b/remoting/webapp/client_plugin_async.js
index b0baec36d3deda87223cafb2130698777b9b3dbd..222a98c985a49b41536bead7f4c4648456b08870 100644
--- a/remoting/webapp/client_plugin_async.js
+++ b/remoting/webapp/client_plugin_async.js
@@ -89,9 +89,9 @@ remoting.ClientPluginAsync.prototype.API_MIN_VERSION_ = 5;
  */
 remoting.ClientPluginAsync.prototype.handleMessage_ = function(message_str) {

[Wez, 2012/04/28 00:00:42]

cleanup: message_str -> messageStr

[Jamie, 2012/04/28 00:15:41]

Done.

   var message = /** @type {{method:string, data:Object.<string,string>}} */
-      JSON.parse(message_str);
+      jsonParseSafe(message_str);
 
-  if (!('method' in message) || !('data' in message)) {
+  if (!message || !('method' in message) || !('data' in message)) {
     console.error('Received invalid message from the plugin: ' + message_str);
     return;
   }