[DevTools] Move Timestamp to Runtime, measure it in milliseconds.

third_party/WebKit/Source/devtools/front_end/sdk/ConsoleModel.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 534 matching lines @@
             payload.source,
             payload.level,
             payload.text,
             payload.type,
             payload.url,
             payload.line,
             payload.column,
             payload.networkRequestId,
             payload.parameters,
             payload.stack,
-            payload.timestamp * 1000, // Convert to ms.
+            payload.timestamp,
             payload.executionContextId,
             payload.scriptId,
             payload.workerId);
         this._console.addMessage(consoleMessage);
     },
 
     /**
      * @override
      * @param {number} count
      */
@@ skipping 88 matching lines @@
         this.dispatchEventToListeners(WebInspector.ConsoleModel.Events.CommandEvaluated, event.data);
     },
 
     __proto__: WebInspector.Object.prototype
 }
 
 /**
  * @type {!WebInspector.MultitargetConsoleModel}
  */
 WebInspector.multitargetConsoleModel;