Add proto_java_library to gn

Add proto_java_library to gn

This adds a pretty straightforward gn template corresponding to
protoc_java.gypi.

protoc_java.py is updated to actually parse options instead of just
using positional arguments.

Adds cacheinvalidation targets.

TBR=brettw, zea

BUG=359249
Committed: https://crrev.com/a3f2d3f6819d1a6709a5a4d8fc62321e478bcc9f
Cr-Commit-Position: refs/heads/master@{#297739}

[cjhopman, 2014-09-19 00:31:11]

Patchset #1 (id:1) has been deleted

[cjhopman, 2014-09-19 00:31:24]

cjhopman@chromium.org changed reviewers:
+ nyquist@chromium.org

[cjhopman, 2014-09-19 00:31:25]

nyquist: *

[nyquist, 2014-09-22 21:25:17]

https://codereview.chromium.org/580343002/diff/40001/build/protoc_java.py
File build/protoc_java.py (right):

https://codereview.chromium.org/580343002/diff/40001/build/protoc_java.py#new...
build/protoc_java.py:9: protoc_java.py --protoc={protoc}
--proto-dir={proto_path} {proto_files}
I think you mean proto-path instead of proto-dir.

Also, I believe --java-out-dir or --srcjar is required.

https://codereview.chromium.org/580343002/diff/40001/build/protoc_java.py#new...
build/protoc_java.py:13: It performs the following steps:
These do not exactly match the steps below, but maybe it's close enough, at
least for when a java-out-dir is specified?

A quick update might be beneficial though.

https://codereview.chromium.org/580343002/diff/40001/build/protoc_java.py#new...
build/protoc_java.py:61: if options.depfile:
Should depfile be specified as a parser option?

https://codereview.chromium.org/580343002/diff/40001/third_party/android_prot...
File third_party/android_protobuf/BUILD.gn (right):

https://codereview.chromium.org/580343002/diff/40001/third_party/android_prot...
third_party/android_protobuf/BUILD.gn:126:
"src/java/src/main/java/com/google/protobuf/nano/MessageNano.java",
lexical ordering

[cjhopman, 2014-09-26 23:39:10]

https://codereview.chromium.org/580343002/diff/40001/build/protoc_java.py
File build/protoc_java.py (right):

https://codereview.chromium.org/580343002/diff/40001/build/protoc_java.py#new...
build/protoc_java.py:9: protoc_java.py --protoc={protoc}
--proto-dir={proto_path} {proto_files}
On 2014/09/22 21:25:16, nyquist wrote:
> I think you mean proto-path instead of proto-dir.
> 
> Also, I believe --java-out-dir or --srcjar is required.

Now that we are using an OptionParser I don't think the --usage is that
important.

https://codereview.chromium.org/580343002/diff/40001/build/protoc_java.py#new...
build/protoc_java.py:13: It performs the following steps:
On 2014/09/22 21:25:16, nyquist wrote:
> These do not exactly match the steps below, but maybe it's close enough, at
> least for when a java-out-dir is specified?
> 
> A quick update might be beneficial though.
Done.

https://codereview.chromium.org/580343002/diff/40001/build/protoc_java.py#new...
build/protoc_java.py:61: if options.depfile:
On 2014/09/22 21:25:16, nyquist wrote:
> Should depfile be specified as a parser option?

It's added by AddDepfileOption above

https://codereview.chromium.org/580343002/diff/40001/third_party/android_prot...
File third_party/android_protobuf/BUILD.gn (right):

https://codereview.chromium.org/580343002/diff/40001/third_party/android_prot...
third_party/android_protobuf/BUILD.gn:126:
"src/java/src/main/java/com/google/protobuf/nano/MessageNano.java",
On 2014/09/22 21:25:16, nyquist wrote:
> lexical ordering

Done.

[nyquist, 2014-09-26 23:42:13]

lgtm

[cjhopman, 2014-10-01 21:16:54]

brettw: TBRed for build/config/android
zea: TBRed for third_party/cacheinvalidation

[cjhopman, 2014-10-01 21:16:57]

The CQ bit was checked by cjhopman@chromium.org

[commit-bot: I haz the power, 2014-10-01 21:18:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/580343002/80001

[commit-bot: I haz the power, 2014-10-01 21:31:49]

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

[commit-bot: I haz the power, 2014-10-01 21:31:51]

Try jobs failed on following builders:
  android_dbg_tests_recipe on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tes...)

[cjhopman, 2014-10-01 21:50:30]

The CQ bit was checked by cjhopman@chromium.org

[commit-bot: I haz the power, 2014-10-01 21:52:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/580343002/100001

[commit-bot: I haz the power, 2014-10-01 23:49:06]

Committed patchset #5 (id:100001) as d79c969c0a129cc640e3d2c657ee95d7892b7965

[commit-bot: I haz the power, 2014-10-01 23:50:31]

Patchset 5 (id:??) landed as
https://crrev.com/a3f2d3f6819d1a6709a5a4d8fc62321e478bcc9f
Cr-Commit-Position: refs/heads/master@{#297739}