Fix memory leak in network_location_provider_unittest

Fix memory leak in network_location_provider_unittest

Use a scoped_ptr to hold the result of JSONReader::ReadAndReturnError
in CheckRequestIsValid method.

BUG=146354
TEST=content_unit_tests:GeolocationNetworkProviderTest.*

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=156313

[bulach, 2012-09-12 11:27:20]

lgtm, thanks!

[commit-bot: I haz the power, 2012-09-12 11:29:38]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jknotten@chromium.org/10913221/2001

[commit-bot: I haz the power, 2012-09-12 12:28:40]

Try job failure for 10913221-2001 (retry) on android for steps "compile, build"
(clobber build).
It's a second try, previously, steps "compile, build" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=android&nu...

[commit-bot: I haz the power, 2012-09-12 13:46:14]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jknotten@chromium.org/10913221/2001

[commit-bot: I haz the power, 2012-09-12 14:35:37]

Try job failure for 10913221-2001 (retry) on android for steps "compile, build"
(clobber build).
It's a second try, previously, steps "compile, build" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=android&nu...

[commit-bot: I haz the power, 2012-09-12 15:17:16]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jknotten@chromium.org/10913221/2001

[commit-bot: I haz the power, 2012-09-12 15:21:14]

Try job failure for 10913221-2001 on win for step "update".
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win&number...

Step "update" is always a major failure.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2012-09-12 16:16:30]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jknotten@chromium.org/10913221/2001