Add ijar to third_party and use it for generating .jar.toc files in GN

Add ijar to third_party and use it for generating .jar.toc files in GN

It's much faster than using javap (what we currently do):

With javap, building chrome_java:
real    1m17.162s
user    7m46.230s
sys     0m42.836s

With ijar, building chrome_java:
real    0m56.446s
user    5m38.761s
sys     0m26.006s

BUG=527632
Committed: https://crrev.com/77614d453e6324c9da3e12b93b4c19800cbe09a9
Cr-Commit-Position: refs/heads/master@{#347208}

[agrieve, 2015-09-03 02:45:27]

agrieve@chromium.org changed reviewers:
+ dpranke@chromium.org, klobag@chromium.org

[agrieve, 2015-09-03 02:45:27]

klobag: for third_party rubber stamp
dpranke: for GN rules

[klobag.chromium, 2015-09-03 14:52:48]

lgtm

[Dirk Pranke, 2015-09-03 15:48:15]

lgtm

https://codereview.chromium.org/1323053003/diff/1/third_party/ijar/BUILD.gn
File third_party/ijar/BUILD.gn (right):

https://codereview.chromium.org/1323053003/diff/1/third_party/ijar/BUILD.gn#n...
third_party/ijar/BUILD.gn:18: "//build/config:debug",
Does this fail in a release build?

[Daniel Berlin, 2015-09-03 15:55:19]

dannyb@google.com changed reviewers:
+ dannyb@google.com

[Daniel Berlin, 2015-09-03 15:55:19]

LGTM to OSTPR

[agrieve, 2015-09-03 18:38:49]

https://codereview.chromium.org/1323053003/diff/1/third_party/ijar/BUILD.gn
File third_party/ijar/BUILD.gn (right):

https://codereview.chromium.org/1323053003/diff/1/third_party/ijar/BUILD.gn#n...
third_party/ijar/BUILD.gn:18: "//build/config:debug",
On 2015/09/03 15:48:15, Dirk Pranke wrote:
> Does this fail in a release build?

No... no it does not. (fixed!)

[agrieve, 2015-09-03 18:39:18]

The CQ bit was checked by agrieve@chromium.org

[agrieve, 2015-09-03 18:39:18]

The patchset sent to the CQ was uploaded after l-g-t-m from
dpranke@chromium.org, klobag@chromium.org, dannyb@google.com
Link to the patchset: https://codereview.chromium.org/1323053003/#ps20001
(title: "fix release mode")

[commit-bot: I haz the power, 2015-09-03 18:39:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1323053003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1323053003/20001

[commit-bot: I haz the power, 2015-09-03 19:12:25]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-03 19:13:10]

Patchset 2 (id:??) landed as
https://crrev.com/77614d453e6324c9da3e12b93b4c19800cbe09a9
Cr-Commit-Position: refs/heads/master@{#347208}