Some bubbles are getting major overhauls. Those should be tracked independently. For launching Harmony I think it should be enough to update what we have. Manual updates will be necessary:

a) all buttons should switch to the new style (there are factory functions in MdTextButton to make this easier to synchronize with the --secondary-ui-md flag)
b) other random stuff like the [x] button in the password save bubble's list of passwords should reuse MD assets. (In this example, it should probably match the [x] in the find in page bar.)

It will require a fine toothed comb and a lot of investigation to find all the bubbles and dialogs and see if their contents need changing. Luckily, most controls should be updated for "free": the action buttons, the window close button, and all the controls which we're updating in place (i.e. don't require changes to the call site) will automatically update as we address those tasks.