Quota: Remove test suppressions for fixed tests

Depends on: https://codereview.chromium.org/152893007/


BUG=341479
TEST=run_webkit_tests.sh storage/quota\* --debug

Review URL: https://codereview.chromium.org/147493012

git-svn-id: svn://svn.chromium.org/blink/trunk@166814 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove Internals::createContentElement.

We don't need Internals::createContentElement anymore.
Just document.createElement('content') works fine.

BUG=337728

Review URL: https://codereview.chromium.org/155703003

git-svn-id: svn://svn.chromium.org/blink/trunk@166815 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Update WATCHLISTS following core/platform removal.

BUG=

Review URL: https://codereview.chromium.org/150573019

git-svn-id: svn://svn.chromium.org/blink/trunk@166816 bbb929c8-8fbe-4397-9dbb-9b2b20218538