HttpServerProperties: Pass NetworkIsolationKey to NetworkStats methods

This CL adds NetworkIsolationKey as an argument to the
ServerNetworkStats methods in HttpServerProperties, and makes
consumers pass in the correct key.

Bug: 969890
Change-Id: I0259dc37b0428a7a649e2391b6c23459caba4673
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1758297
Commit-Queue: Matt Menke <[email protected]>
Reviewed-by: Zhongyi Shi <[email protected]>
Cr-Commit-Position: refs/heads/master@{#689107}
11 files changed