Extract testing utilities from gdata_wapi_operations_unittest to test_util.

Extract testing utilities from gdata_wapi_operations_unittest to test_util.

This is preparation to implement Download operation, whose test uses the
extracted utilities in base_operations_server_unittest.cc

BUG=148627
TEST=Ran unit_tests.


Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=180494

[hidehiko, 2013-02-04 07:17:11]

Thank you for your review in advance,
- hidehiko

[satorux1, 2013-02-04 07:37:10]

LGTM

[kinaba, 2013-02-04 07:40:42]

lgtm

[commit-bot: I haz the power, 2013-02-04 14:54:11]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hidehiko@chromium.org/12093107/1

[commit-bot: I haz the power, 2013-02-04 15:16:54]

Sorry for I got bad news for ya.
Compile failed with a clobber build on ios_rel_device.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=ios_rel_de...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-02-04 15:44:21]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hidehiko@chromium.org/12093107/1

[commit-bot: I haz the power, 2013-02-04 20:19:37]

Change committed as 180494