Inline static Create() from core/dom

As advised in [1], this CL ports calls to Foo::Create() factory
functions to use MakeGarbageCollected<Foo> from
//third_party/blink/renderer/core/dom.

[1] https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/iJ1bawbxbWs/vEdfT5QtBg>

Bug: 939691
Change-Id: I9ed956ee209084aab6dd88167d82093d85059745
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1624807
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Cr-Commit-Position: refs/heads/master@{#662625}
60 files changed