DevTools: make Id the first parameter of protocol message.

Source/devtools/front_end/sdk/InspectorBackend.js

Index: Source/devtools/front_end/sdk/InspectorBackend.js
diff --git a/Source/devtools/front_end/sdk/InspectorBackend.js b/Source/devtools/front_end/sdk/InspectorBackend.js
index 3bdada91dcbfb48810d633cdded2be704aaa4069..3c9f9558c31285c8c8089e5e056a8562849a8122 100644
--- a/Source/devtools/front_end/sdk/InspectorBackend.js
+++ b/Source/devtools/front_end/sdk/InspectorBackend.js
@@ -408,15 +408,16 @@ InspectorBackendClass.Connection.prototype = {
     _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));