Use async BrowserWindow::setDocumentEdited

src/atom.coffee

@@ -451,6 +451,7 @@ class Atom extends Model
   center: ->
     ipc.send('call-window-method', 'center')
 
+
   # Schedule the window to be shown and focused on the next tick.
   #
   # This is done in a next tick to prevent a white flicker from occurring
@@ -470,6 +471,9 @@ class Atom extends Model
     app.emit('will-exit')
     remote.process.exit(status)
 
+  setDocumentEdited: (edited) ->
+    ipc.send('call-window-method', 'setDocumentEdited', edited)
+
   # Public: Is the current window in development mode?
   inDevMode: ->
     @getLoadSettings().devMode

src/workspace-view.coffee

@@ -232,8 +232,8 @@ class WorkspaceView extends View
   # On OS X, fades the application window's proxy icon when the current file
   # has been modified.
   updateDocumentEdited: ->
-    modified = @getModel().getActivePaneItem()?.isModified?() ? false
-    atom.getCurrentWindow().setDocumentEdited modified
+    modified = @model.getActivePaneItem()?.isModified?() ? false
+    atom.setDocumentEdited(modified)
 
   # Get all editor views.
   #