GitLab

We now support Web Share Targets with method POST and enctype
"application/x-www-form-urlencoded"

Note that enctype "multipart/form-data" is already supported.

Spec:
https://w3c.github.io/web-share-target/level-2/#dom-sharetarget-enctype

Not yet implemented:
- Receiving title/text/url using GET.
- Updating PopulateIntentFilters in web_apps_base.cc

Design doc:
https://docs.google.com/document/d/1E4CYASFDVNqmyCbaxa8u8sOn0-Sc1miLeZfA3t3ou5o/edit?usp=sharing

Bug: 1125880
Change-Id: I8fc5fe5dc008fddc6852f44572cf46325faa615f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2584625Reviewed-by: Daniel Murphy <dmurph@chromium.org>
Reviewed-by: Alan Cutter <alancutter@chromium.org>
Commit-Queue: Eric Willigers <ericwilligers@chromium.org>
Auto-Submit: Eric Willigers <ericwilligers@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836508}