DevTools: WI.Throttler goes promisified.

Source/devtools/front_end/bindings/WorkspaceController.js

Index: Source/devtools/front_end/bindings/WorkspaceController.js
diff --git a/Source/devtools/front_end/bindings/WorkspaceController.js b/Source/devtools/front_end/bindings/WorkspaceController.js
index 55530d25d415031e28a33885a8f27d98523f48ff..495aee650f9e57040f478c44d5abbb96725aa424 100644
--- a/Source/devtools/front_end/bindings/WorkspaceController.js
+++ b/Source/devtools/front_end/bindings/WorkspaceController.js
@@ -50,15 +50,14 @@ WebInspector.WorkspaceController.prototype = {
 
         /**
          * @this {WebInspector.WorkspaceController}
-         * @param {!WebInspector.Throttler.FinishCallback} callback
          */
-        function refreshFileSystems(callback)
+        function refreshFileSystems()
         {
             var barrier = new CallbackBarrier();
             var projects = this._workspace.projects();
             for (var i = 0; i < projects.length; ++i)
                 projects[i].refresh("/", barrier.createCallback());
-            barrier.callWhenDone(callback);
+            return barrier.donePromise();
         }
     }
 }