Add a test for base::Bind() and scoped_refptrs copies.

Add a test for base::Bind() and scoped_refptrs copies.

Specifically tracks the number of AddRef()/Release() pairs called for a
method expecting a "const scoped_refptr<T>&". base::Bind()'s impl
currently leads to too many AddRef()/Release() pairs.

BUG=251937
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=208087

[willchan no longer on Chromium, 2013-06-21 03:33:15]

Haven't written code in months so I figured it'd be a nice thing to make sure my
client still works. Wrote a test to document this bug, and hopefully we'll fix
this eventually.

[awong, 2013-06-21 19:46:56]

LGTM

I should have added this test from the beginning. Thanks for adding it now. :)

https://codereview.chromium.org/17514007/diff/1/base/bind_unittest.cc
File base/bind_unittest.cc (right):

https://codereview.chromium.org/17514007/diff/1/base/bind_unittest.cc#newcode217
base/bind_unittest.cc:217: 
remove extra newline.

[commit-bot: I haz the power, 2013-06-21 21:38:49]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/willchan@chromium.org/17514007/17001

[commit-bot: I haz the power, 2013-06-22 02:08:47]

Retried try job too often on win_rel for step(s) browser_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2013-06-22 19:34:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/willchan@chromium.org/17514007/17001

[commit-bot: I haz the power, 2013-06-22 20:32:51]

Change committed as 208087