Web Inspector: Integrate new regionOversetChange event into inspector
Added the new regionOversetChange event to the WebInspector.

BUG=252250
NOTRY=true
(unrelated failing tests on win-layout-rel)

Review URL: https://chromiumcodereview.appspot.com/17848002

git-svn-id: svn://svn.chromium.org/blink/trunk@153130 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert "Refactoring: Simplify DocumentWriter by reorganizing its lifetime." and its followup.

This reverts
- commit 4ff65c01def1ee0d54beb0e882eb4e46bea6cbc0 and
- commit cb96964323faa7e4c0c37389bc7b217f7e06055a.

Fixed an assertion failure which should've been a part of r153126.

TBR=abarth
BUG=

Review URL: https://codereview.chromium.org/18043002

git-svn-id: svn://svn.chromium.org/blink/trunk@153131 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add more select elements with various states.

This is a preparation to fix a bug.

BUG=82280
R=keishi@chromium.org

Review URL: https://codereview.chromium.org/18021002

git-svn-id: svn://svn.chromium.org/blink/trunk@153132 bbb929c8-8fbe-4397-9dbb-9b2b20218538