DevTools: make Id the first parameter of protocol message.

Source/devtools/front_end/sdk/InspectorBackend.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 390 matching lines @@
     /**
      * @param {string} domain
      * @param {string} method
      * @param {?Object} params
      * @param {?function(*)} callback
      * @private
      */
     _wrapCallbackAndSendMessageObject: function(domain, method, params, callback)
     {
         var messageObject = {};
+
+        var messageId = this.nextMessageId();
+        messageObject.id = messageId;
+
         messageObject.method = method;
         if (params)
             messageObject.params = params;
 
         var wrappedCallback = this._wrap(callback, domain, method);
 
-        var messageId = this.nextMessageId();
-        messageObject.id = messageId;
-
         if (InspectorBackendClass.Options.dumpInspectorProtocolMessages)
             this._dumpProtocolMessage("frontend: " + JSON.stringify(messageObject));
 
         this.sendMessage(messageObject);
         ++this._pendingResponsesCount;
         this._callbacks[messageId] = wrappedCallback;
     },
 
     /**
      * @param {?function(*)} callback
@@ skipping 437 matching lines @@
     }
 
 }
 
 InspectorBackendClass.Options = {
     dumpInspectorTimeStats: false,
     dumpInspectorProtocolMessages: false
 }
 
 InspectorBackend = new InspectorBackendClass();