Shards contain full file paths, and we have no limit on the number of tests in a shard. This is problematic because shards are passed over process boundaries, so large objects are more expensive. Make our shard tasks smaller.
<rdar://problem/101973633>
Pull request: https://github.com/WebKit/WebKit/pull/6148
*** Bug 273899 has been marked as a duplicate of this bug. ***