Add a workaround to compare types in mocked method

Add a workaround to compare types in mocked method

The description of type returned by @encode(__typeof__(expr)) and
[[NSInvocation methodSignature] methodReturnType] are not equal
for C++ objects when building with libc++.

The value returned by methodSignature does not expand some internal
template parameters. When comparing the types are the same, we do
not really care about the type implementation, just that the types
are the same (ie. same global name), so just ignore all expansions.

BUG=377691
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=279796

[sdefresne, 2014-06-04 14:08:46]

thakis: PTAL

stuartmorgan, jfroy: FYI on how I plan to fix http://crbug.com/377691

[Nico, 2014-06-04 22:15:34]

Did you try to send this to upstream ocmock?

[sdefresne, 2014-06-23 10:01:19]

Reported as https://github.com/erikdoe/ocmock/issues/96 and sent a pull request.

[Nico, 2014-06-23 15:54:47]

lgtm with link to pull request in readme

Thanks!

[sdefresne, 2014-06-25 17:36:59]

The CQ bit was checked by sdefresne@chromium.org

[commit-bot: I haz the power, 2014-06-25 17:37:49]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sdefresne@chromium.org/316873003/10001

[commit-bot: I haz the power, 2014-06-25 20:23:21]

Change committed as 279796