Tidy up preload related states in blink::Resource
This CL cleans up preload related states in Resource as following:
- Removes preload_count_ and introduces is_unused_preload_. With this
change, a resource can be a preload for only one request, and hence
tied to one ResourceFetcher at a time.
- Renames IncreasePreloadCount and DecreasePreloadCount to
MarkAsPreload and MatchPreload respectively.
- Removed preload_result_.
- Changes the timing of kPreloadNotReferenced => kPreloadReferenced
(i.e., true => false for is_unused_preload_) state transition from
when a ResourceClient is added to when MatchPreload is called.
- Removes PreloadReferencePolicy.
Bug: 652228
Change-Id: I6564c0eed24f19051ee49c429cf87db746414023
Reviewed-on: https://chromium-review.googlesource.com/544363
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Yoav Weiss <yoav@yoav.ws>
Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Reviewed-by: Hiroshige Hayashizaki <hiroshige@chromium.org>
Reviewed-by: Takeshi Yoshino <tyoshino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486730}8 files changed
