GitLab

This CL updates the intent picker bubble view code to close and clear
the existing intent picker bubble if the code trying to show another
intent picker bubble. During testing, I found out that showing a new
intent picker bubble when there is already a bubble showing will crash
the browser. And there are suspected crash report that possibly relate
to this.

BUG=1148517, 853604

Change-Id: Ibf720342acf73602608278ca48f71435a9e61e24
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2539808
Commit-Queue: Maggie Cai <mxcai@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828639}