Set Resource Timing transferSize field in Workers
The transferSize field was not correctly set in Worker contexts. Fix it.
Also create variants of the PerformanceResourceTiming size field layout
tests which use a Worker.
The common code between the worker and non-worker tests is factored out into
javascript files.
BUG=
630055
Committed:
https://crrev.com/147a3f85d9f0bb1e2a654822a555d470f5fa45d4
Cr-Commit-Position: refs/heads/master@{#408048}