I, personally, have already become accustomed to the new App Launcher and don't mind it at all. I may even start to like it soon. If you, however, absolutely cannot function without the black menu bar, check out the Proper Menubar extension for Chrome. It provides you with a similar version of the original Google menu bar with quick links to most of your Google tools. It does not include links to your domain/marketplace apps.
You can even go into the extension's options and configure which links are included in your menu bar, which websites it appears on, and the background color.