Enable KeepAliveRendererForKeepaliveRequests

As the finch experiment didn't show significant performance / stability
regressions, this CL enables the feature by default.

This is not a user-facing feature.

Bug: 695939
Change-Id: I92596eade7c0718356ef6b9b575294ecf7874055
Reviewed-on: https://chromium-review.googlesource.com/708101
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Takeshi Yoshino <tyoshino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#507952}
2 files changed