GitLab

Added Metadata headers to classes derived from View in namespace
views. Added GetClassName() and kViewClassName to Metadata macros.
Also deleted existing overrides and implementations of GetClassName()
& kViewClassName in .h and .cc files where Metadata was implemented.

In the future, possible to add Metadata to other View subclasses in
other namespaces and replace/add GetClassName() override through Metadata.

Bug: 939865
Change-Id: If08f07aeba46a058edb3b2e02a5bd174ccc4c924
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1627026
Commit-Queue: Kristyn Hamasaki <khamasaki@google.com>
Reviewed-by: Wei Li <weili@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#666948}