Add TextBubble String Constructor

Adds a generic constructor to widget.TextBubble to accept a String so
that formattable string resources can be used in TextBubbles.

This CL is 2 of 4 to move the DataSaver "Chrome saved you XX data" from
a snackbar to an IPH.

Bug: 878337
Change-Id: I35b04641bcd680fa4eaa527f265b4c7f33f6ddd1
Reviewed-on: https://chromium-review.googlesource.com/c/1492472
Commit-Queue: Robert Ogden <robertogden@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636886}
1 file changed