Inline static Create() from core/html - 6

As advised in [1], after porting calls to Foo::Create() factory
functions to use MakeGarbageCollected<Foo> from classes in
//third_party/blink/renderer/core/html, this CL removes unused Create()
methods.

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

Bug: 939691
Change-Id: I86b27b94a4a3e3067a215c64a3b6ca02fd4a692f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1581637
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Cr-Commit-Position: refs/heads/master@{#653975}
99 files changed