DevTools: use shorthand syntax in interface definitions.

third_party/WebKit/Source/devtools/front_end/common/Object.js

Index: third_party/WebKit/Source/devtools/front_end/common/Object.js
diff --git a/third_party/WebKit/Source/devtools/front_end/common/Object.js b/third_party/WebKit/Source/devtools/front_end/common/Object.js
index 3a6a890b7c852ec41649530ac4789fc36e02f322..6a389f7d9fc64b8b9f75b83794d29cc0f448ec25 100644
--- a/third_party/WebKit/Source/devtools/front_end/common/Object.js
+++ b/third_party/WebKit/Source/devtools/front_end/common/Object.js
@@ -164,29 +164,29 @@ Common.EventTarget.prototype = {
    * @param {!Object=} thisObject
    * @return {!Common.EventTarget.EventDescriptor}
    */
-  addEventListener: function(eventType, listener, thisObject) {},
+  addEventListener(eventType, listener, thisObject) {},
 
   /**
    * @param {string|symbol} eventType
    * @param {function(!Common.Event)} listener
    * @param {!Object=} thisObject
    */
-  removeEventListener: function(eventType, listener, thisObject) {},
+  removeEventListener(eventType, listener, thisObject) {},
 
-  removeAllListeners: function() {},
+  removeAllListeners() {},
 
   /**
    * @param {string|symbol} eventType
    * @return {boolean}
    */
-  hasEventListeners: function(eventType) {},
+  hasEventListeners(eventType) {},
 
   /**
    * @param {string|symbol} eventType
    * @param {*=} eventData
    * @return {boolean}
    */
-  dispatchEventToListeners: function(eventType, eventData) {},
+  dispatchEventToListeners(eventType, eventData) {},
 };
 
 /**