Remove use of JSONReader::DeprecatedRead from common_extension_api_unittest.cc

Remove use of JSONReader::DeprecatedRead from common_extension_api_unittest.cc

Remove use of deprecated function DeprecatedRead
from chrome/common/extensions/api/common_extension_api_unittest.cc

BUG=523194
Committed: https://crrev.com/85c3aac37791013c8b5792ffb0548039c62a5ff5
Cr-Commit-Position: refs/heads/master@{#347885}

[Olli Raula, 2015-09-07 13:02:13]

olli.raula@intel.com changed reviewers:
+ reillyg@chromium.org

[Olli Raula, 2015-09-07 13:02:38]

Could you review

[Reilly Grant (use Gerrit), 2015-09-08 21:05:05]

lgtm

[Olli Raula, 2015-09-09 06:25:24]

The CQ bit was checked by olli.raula@intel.com

[commit-bot: I haz the power, 2015-09-09 06:25:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1321313004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1321313004/20001

[commit-bot: I haz the power, 2015-09-09 09:16:00]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-09 09:17:25]

Patchset 2 (id:??) landed as
https://crrev.com/85c3aac37791013c8b5792ffb0548039c62a5ff5
Cr-Commit-Position: refs/heads/master@{#347885}