Revert of [DevTools] Remove methods on Common.Event.

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 393 matching lines @@
   }
 
   /**
    * @param {?SDK.DebuggerPausedDetails} debuggerPausedDetails
    * @return {boolean}
    */
   _setDebuggerPausedDetails(debuggerPausedDetails) {
     this._isPausing = false;
     this._debuggerPausedDetails = debuggerPausedDetails;
     if (this._debuggerPausedDetails) {
-      if (Runtime.experiments.isEnabled('emptySourceMapAutoStepping') && this._beforePausedCallback) {
-        if (!this._beforePausedCallback.call(null, this._debuggerPausedDetails))
+      if (Runtime.experiments.isEnabled('emptySourceMapAutoStepping')) {
+        if (this.dispatchEventToListeners(SDK.DebuggerModel.Events.BeforeDebuggerPaused, this._debuggerPausedDetails))
           return false;
       }
       this.dispatchEventToListeners(SDK.DebuggerModel.Events.DebuggerPaused, this._debuggerPausedDetails);
     }
     if (debuggerPausedDetails)
       this.setSelectedCallFrame(debuggerPausedDetails.callFrames[0]);
     else
       this.setSelectedCallFrame(null);
     return true;
   }
 
   /**
-   * @param {?function(!SDK.DebuggerPausedDetails):boolean} callback
-   */
-  setBeforePausedCallback(callback) {
-    this._beforePausedCallback = callback;
-  }
-
-  /**
    * @param {!Array.<!Protocol.Debugger.CallFrame>} callFrames
    * @param {string} reason
    * @param {!Object|undefined} auxData
    * @param {!Array.<string>} breakpointIds
    * @param {!Protocol.Runtime.StackTrace=} asyncStackTrace
    */
   _pausedScript(callFrames, reason, auxData, breakpointIds, asyncStackTrace) {
     var pausedDetails =
         new SDK.DebuggerPausedDetails(this, callFrames, reason, auxData, breakpointIds, asyncStackTrace);
     if (!this._setDebuggerPausedDetails(pausedDetails))
@@ skipping 362 matching lines @@
 SDK.DebuggerModel.PauseOnExceptionsState = {
   DontPauseOnExceptions: 'none',
   PauseOnAllExceptions: 'all',
   PauseOnUncaughtExceptions: 'uncaught'
 };
 
 /** @enum {symbol} */
 SDK.DebuggerModel.Events = {
   DebuggerWasEnabled: Symbol('DebuggerWasEnabled'),
   DebuggerWasDisabled: Symbol('DebuggerWasDisabled'),
+  BeforeDebuggerPaused: Symbol('BeforeDebuggerPaused'),
   DebuggerPaused: Symbol('DebuggerPaused'),
   DebuggerResumed: Symbol('DebuggerResumed'),
   ParsedScriptSource: Symbol('ParsedScriptSource'),
   FailedToParseScriptSource: Symbol('FailedToParseScriptSource'),
   GlobalObjectCleared: Symbol('GlobalObjectCleared'),
   CallFrameSelected: Symbol('CallFrameSelected'),
   ConsoleCommandEvaluatedInSelectedCallFrame: Symbol('ConsoleCommandEvaluatedInSelectedCallFrame')
 };
 
 /** @enum {string} */
@@ skipping 484 matching lines @@
         stack.callFrames.shift();
       if (previous && !stack.callFrames.length)
         previous.parent = stack.parent;
       else
         previous = stack;
       stack = stack.parent;
     }
     return asyncStackTrace;
   }
 };