GitLab

Removed the need to use the global GetInstanceForNativeUi() call
to get required colors when constructing avatars and sync icons
for profile menu views.

Also updated the profile menus such that their sync and avatar
icons are updated appropriately on theme changes.

Performed some basic cleanup, moved some functions into the base
class.

Bug: None
Change-Id: Ia3566c77653c3209265d077e64b524b7bde9c8e1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2070377
Commit-Queue: Thomas Lukaszewicz <tluk@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#745048}