Remove supportsMediaMIMEType()/2 override, part 3 of 3

Final step to remove supportsMediaMIMEType()/2 now that all overrides
have been removed from the Chrome code.

BUG=231309

Review URL: https://codereview.chromium.org/26251006

git-svn-id: svn://svn.chromium.org/blink/trunk@159348 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Rename EventNames to EventTypeNames

This CL prepares use to move the list of Event IDL interfaces from being
thread-local to being thread-safe. They'll use the "EventNames" name to be
consistent with EventTargetNames. Naming is hard. :(

TBR=eseidel@chromium.org

Review URL: https://codereview.chromium.org/26745007

git-svn-id: svn://svn.chromium.org/blink/trunk@159349 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add missing file from my last commit.

git-svn-id: svn://svn.chromium.org/blink/trunk@159350 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Fix getComputedStyle background-position to output calc values

BUG=260097
Review URL: https://codereview.chromium.org/23651010

Review URL: https://codereview.chromium.org/23651010

git-svn-id: svn://svn.chromium.org/blink/trunk@159351 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[blink] Rename WebTextCheckingResult::type to 'decoration'

This patch renames WebTextCheckingResult::type to
WebTextCheckingResult::decoration.

BUG=302807

Review URL: https://codereview.chromium.org/26331006

git-svn-id: svn://svn.chromium.org/blink/trunk@159352 bbb929c8-8fbe-4397-9dbb-9b2b20218538