commit 80b8282d97f105ac5f59a50640d732e62374e4e2
author Kunihiko Sakamoto <ksakamoto@chromium.org> Fri Nov 10 06:52:28 2017
committer Commit Bot <commit-bot@chromium.org> Fri Nov 10 06:52:28 2017
tree 9aa1888cc829512311dd246c81ae0768898892fa
parent 4536c5ccb6e228d4c93e26ebd8a4672b31747738

Implement link rel=modulepreload

This implements link rel=modulepreload without submodules fetch,
behind the Experimental Web Platform feature flag.

LinkLoader fetches module script using Modulator::FetchSingle, so it
populates the module map but does not fetch descendant modules.
Unlike the preload fetches by link rel=preload, this doesn't set
FetchParameters::SetLinkPreload flag, so it works like a regular
script fetch.

HTMLPreloadScanner fetches module scripts in a similar way to
speculative preload of <script type=module>, i.e. just fetch a
ScriptResource and not populate the module map.

Spec PR: https://github.com/whatwg/html/pull/2383
Intent to implement:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/ynkrM70KDD4

Bug: 740886
Change-Id: I5f4420e305f4962b3fbe3f703ce95a5a43e4f7a9
Reviewed-on: https://chromium-review.googlesource.com/662697
Commit-Queue: Kunihiko Sakamoto <ksakamoto@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#515490}