WheelEvent created using document.createEvent() is not properly initialized

WheelEvent created using document.createEvent() is not properly initialized,
its deltaX, deltaY, deltaZ attributes are uninitialized. The specification
indicates that those should be initialized to 0.

R=arv
BUG=227454

Review URL: https://chromiumcodereview.appspot.com/23381002

git-svn-id: svn://svn.chromium.org/blink/trunk@156500 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Encoding API: Use encodings table from spec in tests; add labels tests

BUG=243354
R=kbr@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23021013

git-svn-id: svn://svn.chromium.org/blink/trunk@156501 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove FrameLoaderStateMachine::DisplayingInitialEmptyDocumentPostCommit

Jump straight to CommittedFirstRealLoad instead. Something similar was
attempted and rolled out due to a perf regression a few months ago. This
version passes dromaeo_domcoreattr, which was what regressed.

BUG=none

Review URL: https://chromiumcodereview.appspot.com/22891017

git-svn-id: svn://svn.chromium.org/blink/trunk@156502 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add failing mac layout tests to TestExpectations

https://codereview.chromium.org/18938002/ introduced some failling tests on mac.
Putting them in TestExpectations until I can diagnose.

TBR=jianli@chromium.org

BUG=277088

Review URL: https://codereview.chromium.org/22848004

git-svn-id: svn://svn.chromium.org/blink/trunk@156503 bbb929c8-8fbe-4397-9dbb-9b2b20218538