Fixes the redirect to external apps when navigating from PWA.
This is done with avoiding explicit chrome package name (using
component name instead) and using
EXTRA_SEND_TO_EXTERNAL_DEFAULT_HANDLER on the intent.
With this patch the redirect works, however it takes a long time for CCT to
consult ExternalNavigationHandler. This results in suboptimal UX. Same redirect
in ChromeTabbedActivity is almost instantaneous. Result is that
for _blank links CCT shows up briefly before redirecting to an external app.
In a follow up it should be investigated why it is the case and if it cannot
be improved, we might need to bypass CCT in such case, which would diverge
from existing navigation paths for _blank links in Clank.
BUG=740402
Review-Url: https://codereview.chromium.org/2969143002
Cr-Commit-Position: refs/heads/master@{#485831}
7 files changed
