Reland of android: Move most hooks to target_os-specific section.

Reland of android: Move most hooks to target_os-specific section. (patchset #1 id:1 of https://codereview.chromium.org/2900523002/ )

Reason for revert:
The underlying issue was fixed.

Original issue's description:
> Revert of android: Move most hooks to target_os-specific section. (patchset #3 id:40001 of https://codereview.chromium.org/2889323003/ )
> 
> Reason for revert:
> Causes build failures.
> 
> BUG=724813
> 
> Original issue's description:
> > android: Move most hooks to target_os-specific section.
> > 
> > gclient recently learned about os-specific hooks, so let's make it so
> > that only people working on android need to run the many, many
> > android-specific hooks.
> > 
> > No intended behavior change.  This depends on your gclient being
> > up-to-date -- it's supposed to auto-update every time you run
> > `gclient`, but that sometimes doesn't work.  If you see issues
> > after this, `cd ~/src/depot_tools` and `git log` to verify
> > that your depot_tools is up-to-date (if it isn't, it's probably
> > easiest to delete and re-checkout depot_tools).
> > 
> > BUG=none
> > 
> > Review-Url: https://codereview.chromium.org/2889323003
> > Cr-Commit-Position: refs/heads/master@{#473247}
> > Committed: https://chromium.googlesource.com/chromium/src/+/e11217d349cd215cde35f3dde1174a149303ac9c
> 
> TBR=jbudorick@chromium.org,thakis@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=none
> 
> Review-Url: https://codereview.chromium.org/2900523002
> Cr-Commit-Position: refs/heads/master@{#473446}
> Committed: https://chromium.googlesource.com/chromium/src/+/44faa4c06bee5c2bc6f5588dad8e75dc93e5de57

TBR=jbudorick@chromium.org,amineer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=724813
Review-Url: https://codereview.chromium.org/2901773006
Cr-Commit-Position: refs/heads/master@{#474292}
Committed: https://chromium.googlesource.com/chromium/src/+/973bb243e5b37af1b8f8b34f44f2643a1aca7e3e

[Nico, 2017-05-24 14:07:49]

The CQ bit was checked by thakis@chromium.org

[Nico, 2017-05-24 14:07:49]

Created Reland of android: Move most hooks to target_os-specific section.

[commit-bot: I haz the power, 2017-05-24 14:08:04]

CQ is trying da patch.

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

[jbudorick, 2017-05-24 14:09:12]

lgtm stamp

[commit-bot: I haz the power, 2017-05-24 15:27:17]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1495634869026470, "parent_rev":
"92ee490845d92f5159028b4ed80b4e4fe5db545f", "commit_rev":
"973bb243e5b37af1b8f8b34f44f2643a1aca7e3e"}

[commit-bot: I haz the power, 2017-05-24 15:27:30]

Description was changed from

==========
Reland of android: Move most hooks to target_os-specific section. (patchset #1
id:1 of https://codereview.chromium.org/2900523002/ )

Reason for revert:
The underlying issue was fixed.

Original issue's description:
> Revert of android: Move most hooks to target_os-specific section. (patchset #3
id:40001 of https://codereview.chromium.org/2889323003/ )
> 
> Reason for revert:
> Causes build failures.
> 
> BUG=724813
> 
> Original issue's description:
> > android: Move most hooks to target_os-specific section.
> > 
> > gclient recently learned about os-specific hooks, so let's make it so
> > that only people working on android need to run the many, many
> > android-specific hooks.
> > 
> > No intended behavior change.  This depends on your gclient being
> > up-to-date -- it's supposed to auto-update every time you run
> > `gclient`, but that sometimes doesn't work.  If you see issues
> > after this, `cd ~/src/depot_tools` and `git log` to verify
> > that your depot_tools is up-to-date (if it isn't, it's probably
> > easiest to delete and re-checkout depot_tools).
> > 
> > BUG=none
> > 
> > Review-Url: https://codereview.chromium.org/2889323003
> > Cr-Commit-Position: refs/heads/master@{#473247}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/e11217d349cd215cde35f3dde117...
> 
> TBR=jbudorick@chromium.org,thakis@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=none
> 
> Review-Url: https://codereview.chromium.org/2900523002
> Cr-Commit-Position: refs/heads/master@{#473446}
> Committed:
https://chromium.googlesource.com/chromium/src/+/44faa4c06bee5c2bc6f5588dad8e...

TBR=jbudorick@chromium.org,amineer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=724813
==========

to

==========
Reland of android: Move most hooks to target_os-specific section. (patchset #1
id:1 of https://codereview.chromium.org/2900523002/ )

Reason for revert:
The underlying issue was fixed.

Original issue's description:
> Revert of android: Move most hooks to target_os-specific section. (patchset #3
id:40001 of https://codereview.chromium.org/2889323003/ )
> 
> Reason for revert:
> Causes build failures.
> 
> BUG=724813
> 
> Original issue's description:
> > android: Move most hooks to target_os-specific section.
> > 
> > gclient recently learned about os-specific hooks, so let's make it so
> > that only people working on android need to run the many, many
> > android-specific hooks.
> > 
> > No intended behavior change.  This depends on your gclient being
> > up-to-date -- it's supposed to auto-update every time you run
> > `gclient`, but that sometimes doesn't work.  If you see issues
> > after this, `cd ~/src/depot_tools` and `git log` to verify
> > that your depot_tools is up-to-date (if it isn't, it's probably
> > easiest to delete and re-checkout depot_tools).
> > 
> > BUG=none
> > 
> > Review-Url: https://codereview.chromium.org/2889323003
> > Cr-Commit-Position: refs/heads/master@{#473247}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/e11217d349cd215cde35f3dde117...
> 
> TBR=jbudorick@chromium.org,thakis@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=none
> 
> Review-Url: https://codereview.chromium.org/2900523002
> Cr-Commit-Position: refs/heads/master@{#473446}
> Committed:
https://chromium.googlesource.com/chromium/src/+/44faa4c06bee5c2bc6f5588dad8e...

TBR=jbudorick@chromium.org,amineer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=724813

Review-Url: https://codereview.chromium.org/2901773006
Cr-Commit-Position: refs/heads/master@{#474292}
Committed:
https://chromium.googlesource.com/chromium/src/+/973bb243e5b37af1b8f8b34f44f2...
==========

[commit-bot: I haz the power, 2017-05-24 15:27:31]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/973bb243e5b37af1b8f8b34f44f2...