GitLab

Add an application_label variable to the WebView and TrichromeLibrary
manifests so that the default application label can be overridden with a
jinja variable. This will be used to differentiate channel builds.

Bug: 954668
Change-Id: I9a18c7c9ae393f374713471a9103a812f2c0a104
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1579660Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Richard Coles <torne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653615}