Reland of "Convert Widevine and Android platform key systems to KeySystemProperties" with fix

Reland of "Convert Widevine and Android platform key systems to KeySystemProperties" with fix

This reverts commit ee270d6ac0b30e5d7c028a849ccd96eb82581cab.

WidevineKeySystemProperties replaces the use of KeySystemInfo +
InfoBasedKeySystemProperties for widevine (logic is essentially copied).
Also updated Android platform key systems as it's simpler to convert the
APIs in android_key_systems together.

BUG=457438
TBR=sky,ddorwin,michaelbai

Committed: https://crrev.com/8f42dd5a912f493b232908377a744906199811c1
Cr-Commit-Position: refs/heads/master@{#390661}

[halliwell, 2016-04-29 14:51:04]

The CQ bit was checked by halliwell@chromium.org

[commit-bot: I haz the power, 2016-04-29 14:51:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1927953004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1927953004/20001

[commit-bot: I haz the power, 2016-04-29 16:06:43]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-04-30 17:26:10]

Patchset 2 (id:??) landed as
https://crrev.com/8f42dd5a912f493b232908377a744906199811c1
Cr-Commit-Position: refs/heads/master@{#390661}

[commit-bot: I haz the power, 2016-04-30 18:00:50]

Description was changed from

==========
Reland of "Convert Widevine and Android platform key systems to
KeySystemProperties" with fix

This reverts commit ee270d6ac0b30e5d7c028a849ccd96eb82581cab.

WidevineKeySystemProperties replaces the use of KeySystemInfo +
InfoBasedKeySystemProperties for widevine (logic is essentially copied).
Also updated Android platform key systems as it's simpler to convert the
APIs in android_key_systems together.

BUG=457438
TBR=sky,ddorwin,michaelbai
==========

to

==========
Reland of "Convert Widevine and Android platform key systems to
KeySystemProperties" with fix

This reverts commit ee270d6ac0b30e5d7c028a849ccd96eb82581cab.

WidevineKeySystemProperties replaces the use of KeySystemInfo +
InfoBasedKeySystemProperties for widevine (logic is essentially copied).
Also updated Android platform key systems as it's simpler to convert the
APIs in android_key_systems together.

BUG=457438
TBR=sky,ddorwin,michaelbai

Committed: https://crrev.com/8f42dd5a912f493b232908377a744906199811c1
Cr-Commit-Position: refs/heads/master@{#390661}
==========