jni_generator: remove obsolete/unused features.

jni_generator: remove obsolete/unused features.

Remove several features that Chromium doesn't use from the JNI generator
to help simplify its code (in advance of making further changes and
refactorings).

--jarjar used to be used by WebView but isn't used any more.
--pure_native_methods, --jni_init_native_name, and
--eager_called_by_natives have never been used in Chromium and were only
implemented for other consumers of the script who no longer update from
the Chromium version (since past changes to the script introduced more
Chromium dependencies).

BUG=

Committed: https://crrev.com/2005cc358a6ab988aa925f9186c2104a46b174a9
Cr-Commit-Position: refs/heads/master@{#392343}

[Torne, 2016-05-06 11:10:29]

The CQ bit was checked by torne@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-05-06 11:10:43]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1959583003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1959583003/20001

[Torne, 2016-05-06 11:11:30]

torne@chromium.org changed reviewers:
+ rmcilroy@chromium.org

[Torne, 2016-05-06 11:11:30]

Checked with g3 consumers of the script and their copy is already forked and
unlikely to update from chromium since I've introduced a bunch more
base::android:: dependencies and intend to add more, so I think it's okay to
drop all the features chromium doesn't use in the interest of making the script
a bit easier to understand.

[commit-bot: I haz the power, 2016-05-06 11:42:23]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-05-06 11:42:24]

Dry run: This issue passed the CQ dry run.

[rmcilroy, 2016-05-09 16:28:34]

LGTM given we have already diverged from other users of the tool. Thanks.

[Torne, 2016-05-09 16:31:44]

The CQ bit was checked by torne@chromium.org

[commit-bot: I haz the power, 2016-05-09 16:32:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1959583003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1959583003/20001

[commit-bot: I haz the power, 2016-05-09 17:08:30]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-05-09 17:10:20]

Description was changed from

==========
jni_generator: remove obsolete/unused features.

Remove several features that Chromium doesn't use from the JNI generator
to help simplify its code (in advance of making further changes and
refactorings).

--jarjar used to be used by WebView but isn't used any more.
--pure_native_methods, --jni_init_native_name, and
--eager_called_by_natives have never been used in Chromium and were only
implemented for other consumers of the script who no longer update from
the Chromium version (since past changes to the script introduced more
Chromium dependencies).

BUG=
==========

to

==========
jni_generator: remove obsolete/unused features.

Remove several features that Chromium doesn't use from the JNI generator
to help simplify its code (in advance of making further changes and
refactorings).

--jarjar used to be used by WebView but isn't used any more.
--pure_native_methods, --jni_init_native_name, and
--eager_called_by_natives have never been used in Chromium and were only
implemented for other consumers of the script who no longer update from
the Chromium version (since past changes to the script introduced more
Chromium dependencies).

BUG=

Committed: https://crrev.com/2005cc358a6ab988aa925f9186c2104a46b174a9
Cr-Commit-Position: refs/heads/master@{#392343}
==========

[commit-bot: I haz the power, 2016-05-09 17:10:21]

Patchset 2 (id:??) landed as
https://crrev.com/2005cc358a6ab988aa925f9186c2104a46b174a9
Cr-Commit-Position: refs/heads/master@{#392343}