Rename SharedWorker.RendererSurviveForWorkerTime

As we will keep the render alive also for keepalive fetch requests, this
CL renames existing SharedWorker.RendererSurviveForWorkerTime.

Bug: 695939
Change-Id: If69cbb09898b77217caa223338e79b5adfb55f7c
Reviewed-on: https://chromium-review.googlesource.com/616542
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#497022}
2 files changed