Update the metrics side bar pane and computed style pane after main frame resize.

The metrics pane showing width and height of the main frame should be updated upon receiving
the resize event. This also applies while docking/undocking the DevTools window.

BUG=322997

Review URL: https://codereview.chromium.org/84643002

git-svn-id: svn://svn.chromium.org/blink/trunk@163004 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add UseCounter for SVGLocatable.{nearest,farthest}ViewportElement

BUG=
R=pdr,schenney

Review URL: https://codereview.chromium.org/98573003

git-svn-id: svn://svn.chromium.org/blink/trunk@163005 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove TreatNullAs=NullString for HTMLParamElement

http://whatwg.org/html#htmlparamelement
http://whatwg.org/html#HTMLParamElement-partial

The tests for the updated properties pass in Firefox Nightly, IE11
Release Preview and Opera 12.16.

BUG=310298

Review URL: https://codereview.chromium.org/99353002

git-svn-id: svn://svn.chromium.org/blink/trunk@163007 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove TreatNullAs=NullString for various HTML elements

http://whatwg.org/html#htmllabelelement
http://whatwg.org/html#HTMLLegendElement-partial
http://whatwg.org/html#htmlmapelement
http://whatwg.org/html#htmloptgroupelement
http://whatwg.org/html#htmlstyleelement
http://whatwg.org/html#htmltitleelement

The tests for the updated properties pass in Firefox Nightly, IE11
Release Preview and Opera 12.16, with these exceptions:

IE throws an exception for HTMLLegendElement.align.

BUG=310298

Review URL: https://codereview.chromium.org/99103002

git-svn-id: svn://svn.chromium.org/blink/trunk@163009 bbb929c8-8fbe-4397-9dbb-9b2b20218538