DevTools: Introduce Debugger::Reason::PromiseRejection pause reason.

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 77 matching lines @@
     GlobalObjectCleared: "GlobalObjectCleared",
     CallFrameSelected: "CallFrameSelected",
     ConsoleCommandEvaluatedInSelectedCallFrame: "ConsoleCommandEvaluatedInSelectedCallFrame",
 }
 
 WebInspector.DebuggerModel.BreakReason = {
     DOM: "DOM",
     EventListener: "EventListener",
     XHR: "XHR",
     Exception: "exception",
+    PromiseRejection: "promiseRejection",
     Assert: "assert",
     CSPViolation: "CSPViolation",
     DebugCommand: "debugCommand"
 }
 
 WebInspector.DebuggerModel.prototype = {
     /**
      * @return {boolean}
      */
     debuggerEnabled: function()
@@ skipping 982 matching lines @@
     this.breakpointIds = breakpointIds;
     this.asyncStackTrace = WebInspector.DebuggerModel.StackTrace.fromPayload(target, asyncStackTrace, true);
 }
 
 WebInspector.DebuggerPausedDetails.prototype = {
     /**
      * @return {?WebInspector.RemoteObject}
      */
     exception: function()
     {
-        if (this.reason !== WebInspector.DebuggerModel.BreakReason.Exception)
+        if (this.reason !== WebInspector.DebuggerModel.BreakReason.Exception && this.reason !== WebInspector.DebuggerModel.BreakReason.PromiseRejection)
             return null;
         return this.target().runtimeModel.createRemoteObject(/** @type {!RuntimeAgent.RemoteObject} */(this.auxData));
     },
 
     __proto__: WebInspector.SDKObject.prototype
 }
 
 /**
  * @type {!WebInspector.DebuggerModel}
  */
 WebInspector.debuggerModel;