[DevTools] Support async step in from arbitrary position

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 447 matching lines @@
   /**
    * @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 (pausedDetails && this._continueToLocationCallback) {
+      var callback = this._continueToLocationCallback;
+      delete this._continueToLocationCallback;
+      if (callback(pausedDetails))
+        return;
+    }
+
     if (!this._setDebuggerPausedDetails(pausedDetails))
       this._agent.stepInto();
   }
 
   _resumedScript() {
     this._setDebuggerPausedDetails(null);
     this.dispatchEventToListeners(SDK.DebuggerModel.Events.DebuggerResumed, this);
   }
 
   /**
@@ skipping 577 matching lines @@
     return {scriptId: this.scriptId, lineNumber: this.lineNumber, columnNumber: this.columnNumber};
   }
 
   /**
    * @return {?SDK.Script}
    */
   script() {
     return this.debuggerModel.scriptForId(this.scriptId);
   }
 
-  continueToLocation() {
+  /**
+   * @param {function()=} pausedCallback
+   */
+  continueToLocation(pausedCallback) {
+    if (pausedCallback)
+      this.debuggerModel._continueToLocationCallback = this._paused.bind(this, pausedCallback);
     this.debuggerModel._agent.continueToLocation(this.payload());
   }
 
   /**
+   * @param {function()|undefined} pausedCallback
+   * @param {!SDK.DebuggerPausedDetails} debuggerPausedDetails
+   * @return {boolean}
+   */
+  _paused(pausedCallback, debuggerPausedDetails) {
+    var location = debuggerPausedDetails.callFrames[0].location();
+    if (location.scriptId === this.scriptId && location.lineNumber === this.lineNumber &&
+        location.columnNumber === this.columnNumber) {
+      pausedCallback();
+      return true;
+    }
+    return false;
+  }
+
+  /**
    * @return {string}
    */
   id() {
     return this.debuggerModel.target().id() + ':' + this.scriptId + ':' + this.lineNumber + ':' + this.columnNumber;
   }
 };
 
 /**
  * @unrestricted
  */
@@ skipping 363 matching lines @@
         stack.callFrames.shift();
       if (previous && (!stack.callFrames.length && !stack.promiseCreationFrame))
         previous.parent = stack.parent;
       else
         previous = stack;
       stack = stack.parent;
     }
     return asyncStackTrace;
   }
 };