Rename RenderProcessHost::*Worker*RefCount

RenderProcessHost has methods to increment shared worker / service worker
ref counts. Because they are working in the same manner and I'm planning
to introduce a similar ref count, this CL unifies them to one.

Bug: 695939
Change-Id: I4dccba6eaf725fd9e0ee2e31caab4a1c283e34d9
Reviewed-on: https://chromium-review.googlesource.com/615212
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#494730}
10 files changed