commit df487ceb6910509c0356972ce6b46ce09d12d5cb
author Hiroki Nakagawa <nhiroki@chromium.org> Thu Sep 01 04:36:40 2022
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Thu Sep 01 04:36:40 2022
tree 37ce0624d6ee963337d371fb4fcbac148bc31451
parent 65184af075ba475d47c69c0b0cb055c6253cf31e

SpeculationRule: Implement "target_hint" for prerendering

This CL implements "target_hint" for Speculation Rules based on the
following spec PR:
https://github.com/WICG/nav-speculation/pull/173

- This CL propagates "target_hint" from blink/ to content/browser/, but
  the browser process doesn't use this information yet. Follow-up CLs
  will implement the part. This half-baked implementation is still spec
  compatible as this information is just a hint and browser
  implementation is allowed to ignore them.
- The spec requires the browser to accept the "valid browsing context
  name or keyword"[1] as the hint. As the initial step, this CL only
  supports "_blank" and "_self". If unsupported names or keywords are
  specified in the prerender rules, the rules are treated as no hint.
- When "target_hint" is specified in prefetch rules, the rules are
  ignored.

[1]https://html.spec.whatwg.org/C/#valid-browsing-context-name-or-keyword

Bug: 1354049
Change-Id: Ia4a876e11e814f2dcc86c7dc19bef31b813c33ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3833323
Reviewed-by: Domenic Denicola <domenic@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Reviewed-by: Lingqi Chi <lingqi@chromium.org>
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1041915}