[DevTools] Introduced async step into scheduled function call

third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js

Index: third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js b/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
index 6b477d62f39d0f4744ffa42f94a23b9602f223b9..88b613eb450ce59cb285a8df3504317352aa1596 100644
--- a/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
+++ b/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
@@ -46,6 +46,8 @@ Sources.SourcesPanel = class extends UI.Panel {
         /** @type {!UI.Action }*/ (UI.actionRegistry.action('debugger.step-over'));
     this._stepIntoAction =
         /** @type {!UI.Action }*/ (UI.actionRegistry.action('debugger.step-into'));
+    this._stepIntoAsyncAction =
+        /** @type {!UI.Action }*/ (UI.actionRegistry.action('debugger.step-into-async'));
     this._stepOutAction = /** @type {!UI.Action }*/ (UI.actionRegistry.action('debugger.step-out'));
     this._toggleBreakpointsActiveAction =
         /** @type {!UI.Action }*/ (UI.actionRegistry.action('debugger.toggle-breakpoints-active'));
@@ -472,26 +474,28 @@ Sources.SourcesPanel = class extends UI.Panel {
   _updateDebuggerButtonsAndStatus() {
     var currentTarget = UI.context.flavor(SDK.Target);
     var currentDebuggerModel = SDK.DebuggerModel.fromTarget(currentTarget);
+    var details = currentDebuggerModel ? currentDebuggerModel.debuggerPausedDetails() : null;
     if (!currentDebuggerModel) {
       this._togglePauseAction.setEnabled(false);
       this._stepOverAction.setEnabled(false);
       this._stepIntoAction.setEnabled(false);
+      this._stepIntoAsyncAction.setEnabled(false);
       this._stepOutAction.setEnabled(false);
     } else if (this._paused) {
       this._togglePauseAction.setToggled(true);
       this._togglePauseAction.setEnabled(true);
       this._stepOverAction.setEnabled(true);
       this._stepIntoAction.setEnabled(true);
+      this._stepIntoAsyncAction.setEnabled(details && details.auxData && details.auxData['stepIntoAsyncAvailable']);
       this._stepOutAction.setEnabled(true);
     } else {
       this._togglePauseAction.setToggled(false);
       this._togglePauseAction.setEnabled(!currentDebuggerModel.isPausing());
       this._stepOverAction.setEnabled(false);
       this._stepIntoAction.setEnabled(false);
+      this._stepIntoAsyncAction.setEnabled(false);
       this._stepOutAction.setEnabled(false);
     }
-
-    var details = currentDebuggerModel ? currentDebuggerModel.debuggerPausedDetails() : null;
     this._debuggerPausedMessage.render(details, Bindings.debuggerWorkspaceBinding, Bindings.breakpointManager);
   }
 
@@ -604,40 +608,35 @@ Sources.SourcesPanel = class extends UI.Panel {
     debuggerModel.resume();
   }
 
-  /**
-   * @return {boolean}
-   */
   _stepOver() {
     var debuggerModel = this._prepareToResume();
     if (!debuggerModel)
-      return true;
-
+      return;
     debuggerModel.stepOver();
-    return true;
   }
 
-  /**
-   * @return {boolean}
-   */
   _stepInto() {
     var debuggerModel = this._prepareToResume();
     if (!debuggerModel)
-      return true;
-
+      return;
     debuggerModel.stepInto();
-    return true;
   }
 
-  /**
-   * @return {boolean}
-   */
-  _stepOut() {
+  _stepIntoAsync() {
     var debuggerModel = this._prepareToResume();
     if (!debuggerModel)
-      return true;
+      return;
+    var details = debuggerModel.debuggerPausedDetails();
+    if (!details || !details.auxData || !details.auxData['stepIntoAsyncAvailable'])
+      return;
+    debuggerModel.stepIntoAsync();
+  }
 
+  _stepOut() {
+    var debuggerModel = this._prepareToResume();
+    if (!debuggerModel)
+      return;
     debuggerModel.stepOut();
-    return true;
   }
 
   /**
@@ -683,6 +682,7 @@ Sources.SourcesPanel = class extends UI.Panel {
 
     debugToolbar.appendToolbarItem(UI.Toolbar.createActionButton(this._stepOverAction));
     debugToolbar.appendToolbarItem(UI.Toolbar.createActionButton(this._stepIntoAction));
+    debugToolbar.appendToolbarItem(UI.Toolbar.createActionButton(this._stepIntoAsyncAction));
     debugToolbar.appendToolbarItem(UI.Toolbar.createActionButton(this._stepOutAction));
     debugToolbar.appendSeparator();
     debugToolbar.appendToolbarItem(UI.Toolbar.createActionButton(this._toggleBreakpointsActiveAction));
@@ -1254,6 +1254,9 @@ Sources.SourcesPanel.DebuggingActionDelegate = class {
       case 'debugger.step-into':
         panel._stepInto();
         return true;
+      case 'debugger.step-into-async':
+        panel._stepIntoAsync();
+        return true;
       case 'debugger.step-out':
         panel._stepOut();
         return true;