Allow load_library_from_apk to be set via gn args

Allow load_library_from_apk to be set via gn args

There were already gn args for it and its peers:
 - chrome_public_apk_use_chromium_linker
 - chrome_public_apk_use_relocation_packer
 - chrome_public_apk_load_library_from_apk

However, they were only able to disable the options. With this change,
they are able to both enable and disable.

The main use-case is to allow building with load_library_from_apk for
32-bit arm when testing locally.

BUG=none

Committed: https://crrev.com/0a2180186638ce097261ee94509b56aaad0f9c27
Cr-Commit-Position: refs/heads/master@{#375247}

[agrieve, 2016-02-11 01:11:54]

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

[agrieve, 2016-02-11 01:11:54]

🐸🐸🐸

[agrieve, 2016-02-12 15:16:29]

On 2016/02/11 01:11:54, agrieve wrote:
> 🐸🐸🐸

nudge

[Ted C, 2016-02-12 19:39:22]

lgtm

[agrieve, 2016-02-12 19:44:04]

The CQ bit was checked by agrieve@chromium.org

[commit-bot: I haz the power, 2016-02-12 19:47:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1690603003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1690603003/1

[commit-bot: I haz the power, 2016-02-12 20:37:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-16 22:44:54]

Description was changed from

==========
Allow load_library_from_apk to be set via gn args

There were already gn args for it and its peers:
 - chrome_public_apk_use_chromium_linker
 - chrome_public_apk_use_relocation_packer
 - chrome_public_apk_load_library_from_apk

However, they were only able to disable the options. With this change,
they are able to both enable and disable.

The main use-case is to allow building with load_library_from_apk for
32-bit arm when testing locally.

BUG=none
==========

to

==========
Allow load_library_from_apk to be set via gn args

There were already gn args for it and its peers:
 - chrome_public_apk_use_chromium_linker
 - chrome_public_apk_use_relocation_packer
 - chrome_public_apk_load_library_from_apk

However, they were only able to disable the options. With this change,
they are able to both enable and disable.

The main use-case is to allow building with load_library_from_apk for
32-bit arm when testing locally.

BUG=none

Committed: https://crrev.com/0a2180186638ce097261ee94509b56aaad0f9c27
Cr-Commit-Position: refs/heads/master@{#375247}
==========

[commit-bot: I haz the power, 2016-02-16 22:44:55]

Patchset 1 (id:??) landed as
https://crrev.com/0a2180186638ce097261ee94509b56aaad0f9c27
Cr-Commit-Position: refs/heads/master@{#375247}