drive: Make FileResource copyable

drive: Make FileResource copyable

To implement FakeDriveService without GData WAPI classes.

BUG=334544
TEST=unit_tests

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=260182

[hashimoto, 2014-03-28 07:51:57]

I think using std::vector instead of ScopedVector to store ParentResource in
FIleResource is OK.
Additional copying of ParentResource shouldn't affect the performance much
because it's a very small class.
WDYT?

[hashimoto, 2014-03-28 07:52:18]

On 2014/03/28 07:51:57, hashimoto wrote:
> I think using std::vector instead of ScopedVector to store ParentResource in
> FIleResource is OK.
> Additional copying of ParentResource shouldn't affect the performance much
> because it's a very small class.
> WDYT?

s/ParentResource/ParentReference/

[kinaba, 2014-03-28 08:31:44]

lgtm

[tzik, 2014-03-28 08:46:35]

Change itself LGTM.
Are you going to convert other classes to copyable classes?

[hashimoto, 2014-03-28 09:05:09]

On 2014/03/28 08:46:35, tzik wrote:
> Change itself LGTM.
> Are you going to convert other classes to copyable classes?

There is no need to make other classes copyable to eliminate the use of WAPI
classes and WAPI feed files, because AboutResource is already copyable.
But AppList and AppResource may be going to become copyable if we are to
eliminate the use of applist.json. (IIUC currently we don't have a plat to do
this, though)

[hashimoto, 2014-03-28 09:05:17]

The CQ bit was checked by hashimoto@chromium.org

[commit-bot: I haz the power, 2014-03-28 09:05:42]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hashimoto@chromium.org/216433002/50001

[commit-bot: I haz the power, 2014-03-28 14:02:18]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-03-28 14:02:18]

Retried try job too often on ios_dbg_simulator for step(s) base_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=ios_dbg_si...

[hashimoto, 2014-03-28 15:02:57]

The CQ bit was checked by hashimoto@chromium.org

[commit-bot: I haz the power, 2014-03-28 15:05:32]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hashimoto@chromium.org/216433002/50001

[commit-bot: I haz the power, 2014-03-28 17:21:01]

Change committed as 260182