JNI SampleForTests updated with clearer name for caller object.

JNI SampleForTests updated with clearer name for caller object.

When calling to C++ from Java the second parameter name is
improved from 'obj' to 'caller' to better indicate what jobject is.

Committed: https://crrev.com/e01c44804bbd8c7af3899c27cfca6676e853b2b2
Cr-Commit-Position: refs/heads/master@{#337714}

[scheib, 2015-07-07 23:32:33]

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

[scheib, 2015-07-07 23:32:34]

Let's improve the suggested naming convention for JNI Java -> C++ function
signatures. What do you think of 'obj' -> 'caller'?

[nyquist, 2015-07-08 00:48:37]

lgtm

[scheib, 2015-07-08 00:57:49]

The CQ bit was checked by scheib@chromium.org

[commit-bot: I haz the power, 2015-07-08 00:58:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1212443006/1

[commit-bot: I haz the power, 2015-07-08 01:34:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-08 01:35:48]

Patchset 1 (id:??) landed as
https://crrev.com/e01c44804bbd8c7af3899c27cfca6676e853b2b2
Cr-Commit-Position: refs/heads/master@{#337714}