GitLab

Need to ensure that when switching between Activities, nothing holds
onto the old Activity (ie Context) or Views from the old Activity.
Otherwise it could cause the old Activity to leak. This required fixes
in content as well.

Bug: 1033926
Change-Id: I731cd25b35171a572956d0846eabd259c19ae554
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1980476Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Shimi Zhang <ctzsm@chromium.org>
Commit-Queue: Bo <boliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#728805}