[DevTools] Disable contexts in console selector on pause

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

 /*
  * Copyright (C) 2010 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 671 matching lines @@
    * @return {boolean}
    */
   isPausing() {
     return this._isPausing;
   }
 
   /**
    * @param {?SDK.DebuggerModel.CallFrame} callFrame
    */
   setSelectedCallFrame(callFrame) {
+    if (this._selectedCallFrame === callFrame)
+      return;
     this._selectedCallFrame = callFrame;
-    if (!this._selectedCallFrame)
-      return;
-
-    this.dispatchEventToListeners(SDK.DebuggerModel.Events.CallFrameSelected, callFrame);
+    this.dispatchEventToListeners(SDK.DebuggerModel.Events.CallFrameSelected, this);
   }
 
   /**
    * @return {?SDK.DebuggerModel.CallFrame}
    */
   selectedCallFrame() {
     return this._selectedCallFrame;
   }
 
   /**
@@ skipping 756 matching lines @@
         stack.callFrames.shift();
       if (previous && (!stack.callFrames.length && !stack.promiseCreationFrame))
         previous.parent = stack.parent;
       else
         previous = stack;
       stack = stack.parent;
     }
     return asyncStackTrace;
   }
 };