GitLab

Looking at chrome and android webview, looks like cache dir is used for
http cache and code cache. Use these in weblayer as well. Note before
these, neither disk cache are enabled, so there is no need to consider
any migration issue.

Bug: 1027627
Change-Id: Ib6e615e975a9cd8f7e456c6f5af1c0fac4bceea7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1937087
Commit-Queue: Bo <boliu@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719271}