Add utility for downloading reference APKs.

Add utility for downloading reference APKs.

This will be used primarily on perf bots to download APKs used for
tracking per-milestone patch size growth.

BUG=695188
Review-Url: https://codereview.chromium.org/2750603003
Cr-Commit-Position: refs/heads/master@{#456502}
Committed: https://chromium.googlesource.com/chromium/src/+/2850476323ae769b612011f3d99a2d17759a2952

[estevenson, 2017-03-13 16:19:10]

estevenson@chromium.org changed reviewers:
+ agrieve@chromium.org

[estevenson, 2017-03-13 16:19:10]

ptal Andrew.

My plan is to change the recipe to pass the builder name to resource_sizes.py
and have resource_sizes.py call MaybeDownloadApk and the relevant patch size
methods in third_party/apk-patch-size-estimator/apk_patch_size_estimator.py.

Thoughts on the binary_size directory? Or maybe we should start moving these
things to //tools/binary_size.

[agrieve, 2017-03-13 16:43:08]

lgtm, but please add an OWNERS for build/android/binary_size

[estevenson, 2017-03-13 20:49:33]

The CQ bit was checked by estevenson@chromium.org

[estevenson, 2017-03-13 20:49:33]

The patchset sent to the CQ was uploaded after l-g-t-m from agrieve@chromium.org
Link to the patchset: https://codereview.chromium.org/2750603003/#ps20001
(title: "Add OWNERS")

[commit-bot: I haz the power, 2017-03-13 20:50:27]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-13 22:07:33]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1489438173060110,
"parent_rev": "b17535a3287b3a6e4b04e34106ee778736747312", "commit_rev":
"2850476323ae769b612011f3d99a2d17759a2952"}

[commit-bot: I haz the power, 2017-03-13 22:08:10]

Description was changed from

==========
Add utility for downloading reference APKs.

This will be used primarily on perf bots to download APKs used for
tracking per-milestone patch size growth.

BUG=695188
==========

to

==========
Add utility for downloading reference APKs.

This will be used primarily on perf bots to download APKs used for
tracking per-milestone patch size growth.

BUG=695188

Review-Url: https://codereview.chromium.org/2750603003
Cr-Commit-Position: refs/heads/master@{#456502}
Committed:
https://chromium.googlesource.com/chromium/src/+/2850476323ae769b612011f3d99a...
==========

[commit-bot: I haz the power, 2017-03-13 22:08:12]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/2850476323ae769b612011f3d99a...