[DevTools] Improve context and target naming.

third_party/WebKit/Source/devtools/front_end/sdk/RuntimeModel.js

 /*
  * Copyright (C) 2012 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 450 matching lines @@
    * @param {!SDK.ExecutionContext} a
    * @param {!SDK.ExecutionContext} b
    * @return {number}
    */
   static comparator(a, b) {
     /**
      * @param {!SDK.Target} target
      * @return {number}
      */
     function targetWeight(target) {
+      if (!target.parentTarget())
+        return 4;
       if (target.hasBrowserCapability())
         return 3;
       if (target.hasJSCapability())
         return 2;
       return 1;
     }
 
     var weightDiff = targetWeight(a.target()) - targetWeight(b.target());
     if (weightDiff)
       return -weightDiff;
@@ skipping 299 matching lines @@
         this._type === 'wheel';
   }
 
   /**
    * @return {boolean}
    */
   isNormalListenerType() {
     return this._listenerType === 'normal';
   }
 };