dart-lang/chromedeveditor — pull request #3477 by devoncarew (2014-09-30 15:49:17+00:00)
Title: fix the outline view's toggle button

Fix #3464, the outline view's toggle button should only be enabled for file types that support an outline view.

@ussuri, I have a hard-coded reference to the toggle button from ace.dart. At some point, I want to move to having the button itself listen for enablement of the 'toggle-outline' command.