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This change configures Chrome to
- Download asset component version 1.y,
- Load and decode background.png/.jpeg,
- Only register assets component on Chromes (not Chromiums).

Bug: 793977, 793405, 793384
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I33de68ac0c3317360c0e26ae4274242e87092ff5
Reviewed-on: https://chromium-review.googlesource.com/822835
Commit-Queue: Tibor Goldschwendt <tiborg@chromium.org>
Reviewed-by: Biao She <bshe@chromium.org>
Reviewed-by: Chris Palmer <palmer@chromium.org>
Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524117}