Easier upload progress browser test for Mac buildbots

Mac buildbots take 5-30 times longer to run these tests than the others,
give them the smaller upload progress job for now.

BUG=548819
Committed: https://crrev.com/591eec3d9a017ce11b7f07ad7805ac294cdee2e2
Cr-Commit-Position: refs/heads/master@{#357171}

[Charlie Harrison, 2015-10-29 19:53:55]

Description was changed from

==========
Mac buildbots take 5-30 times longer to run these tests than the others,
give them the smaller upload progress job for now.

BUG=548819
==========

to

==========
Mac buildbots take 5-30 times longer to run these tests than the others,
give them the smaller upload progress job for now.

BUG=548819
==========

[Charlie Harrison, 2015-10-30 12:41:40]

csharrison@chromium.org changed reviewers:
+ mmenke@chromium.org

[Charlie Harrison, 2015-10-30 12:41:42]

Hey Matt, could you take a look at this? Thanks!

[mmenke, 2015-10-30 15:35:37]

LGTM.  Do wonder about why OSX is so slow here, though.

https://codereview.chromium.org/1416003008/diff/20001/content/browser/loader/...
File content/browser/loader/async_resource_handler_browsertest.cc (right):

https://codereview.chromium.org/1416003008/diff/20001/content/browser/loader/...
content/browser/loader/async_resource_handler_browsertest.cc:31: // progress
events. See crbug.com/526985.
Add comment about OSX being slow, too, and a bug link.

[Charlie Harrison, 2015-10-30 18:48:43]

The CQ bit was checked by csharrison@chromium.org

[Charlie Harrison, 2015-10-30 18:48:43]

The patchset sent to the CQ was uploaded after l-g-t-m from mmenke@chromium.org
Link to the patchset: https://codereview.chromium.org/1416003008/#ps40001
(title: "Comment + bug link")

[commit-bot: I haz the power, 2015-10-30 18:49:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1416003008/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1416003008/40001

[commit-bot: I haz the power, 2015-10-30 19:25:01]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-10-30 19:25:50]

Patchset 3 (id:??) landed as
https://crrev.com/591eec3d9a017ce11b7f07ad7805ac294cdee2e2
Cr-Commit-Position: refs/heads/master@{#357171}