[DevTools] enable async stacks by default

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 44 matching lines @@
     this._scriptsBySourceURL = new Map();
     /** @type {!Array.<!SDK.Script>} */
     this._discardableScripts = [];
 
     /** @type {!Common.Object} */
     this._breakpointResolvedEventTarget = new Common.Object();
 
     this._isPausing = false;
     Common.moduleSetting('pauseOnExceptionEnabled').addChangeListener(this._pauseOnExceptionStateChanged, this);
     Common.moduleSetting('pauseOnCaughtException').addChangeListener(this._pauseOnExceptionStateChanged, this);
-    Common.moduleSetting('enableAsyncStackTraces').addChangeListener(this.asyncStackTracesStateChanged, this);
+    Common.moduleSetting('disableAsyncStackTraces').addChangeListener(this.asyncStackTracesStateChanged, this);
 
     /** @type {!Map<string, string>} */
     this._fileURLToNodeJSPath = new Map();
     this.enableDebugger();
 
     /** @type {!Map<string, string>} */
     this._stringMap = new Map();
     this._sourceMapManager.setEnabled(Common.moduleSetting('jsSourceMapsEnabled').get());
     Common.moduleSetting('jsSourceMapsEnabled')
         .addChangeListener(event => this._sourceMapManager.setEnabled(/** @type {boolean} */ (event.data)));
@@ skipping 93 matching lines @@
     if (!Common.moduleSetting('pauseOnExceptionEnabled').get())
       state = SDK.DebuggerModel.PauseOnExceptionsState.DontPauseOnExceptions;
     else if (Common.moduleSetting('pauseOnCaughtException').get())
       state = SDK.DebuggerModel.PauseOnExceptionsState.PauseOnAllExceptions;
     else
       state = SDK.DebuggerModel.PauseOnExceptionsState.PauseOnUncaughtExceptions;
 
     this._agent.setPauseOnExceptions(state);
   }
 
   asyncStackTracesStateChanged() {

[dgozman, 2017/04/21 23:39:17]

While we are here, let's make this private.

[kozy, 2017/04/22 00:02:57]

Done.

-    const maxAsyncStackChainDepth = 8;
-    var enabled = Common.moduleSetting('enableAsyncStackTraces').get() && this._debuggerEnabled;
+    const maxAsyncStackChainDepth = 32;
+    var enabled = !Common.moduleSetting('disableAsyncStackTraces').get() && this._debuggerEnabled;
     this._agent.setAsyncCallStackDepth(enabled ? maxAsyncStackChainDepth : 0);
   }
 
   stepInto() {
     this._agent.stepInto();
   }
 
   stepOver() {
     this._agent.stepOver();
   }
@@ skipping 665 matching lines @@
     }
   }
 
   /**
    * @override
    */
   dispose() {
     this._sourceMapManager.dispose();
     Common.moduleSetting('pauseOnExceptionEnabled').removeChangeListener(this._pauseOnExceptionStateChanged, this);
     Common.moduleSetting('pauseOnCaughtException').removeChangeListener(this._pauseOnExceptionStateChanged, this);
-    Common.moduleSetting('enableAsyncStackTraces').removeChangeListener(this.asyncStackTracesStateChanged, this);
+    Common.moduleSetting('disableAsyncStackTraces').removeChangeListener(this.asyncStackTracesStateChanged, this);
   }
 
   /**
    * @override
    * @return {!Promise}
    */
   suspendModel() {
     return new Promise(promiseBody.bind(this));
 
     /**
@@ skipping 602 matching lines @@
         stack.callFrames.shift();
       if (previous && (!stack.callFrames.length && !stack.promiseCreationFrame))
         previous.parent = stack.parent;
       else
         previous = stack;
       stack = stack.parent;
     }
     return asyncStackTrace;
   }
 };