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There was a naming conflict with url_bar.xml from chrome:// which caused some
chrome smoke tests to fail. This CL fixes that and tries to reland the
original change.

Descrption from the original commit:
UrlBarView is now a LinearLayout with its own resource XML. It contains
a security icon (currently always the lock icon) and a TextView
containing current display URL.

Here's a recording of the UI after this change:
https://drive.google.com/a/google.com/file/d/1q8IzYALoPYd8KLcln4cMEnRjIT6ox_so/view?usp=sharing

TBR=dtrainor@chromium.org,tommycli@chromium.org

Bug: 1025607
Change-Id: I47f94905de9a220f02a589814a7eada550e1b303
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2049980
Commit-Queue: Mugdha Lakhani <nator@chromium.org>
Reviewed-by: Peter Conn <peconn@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#741444}