Unreviewed, rolling out r121635.

Unreviewed, rolling out r121635.
http://trac.webkit.org/changeset/121635
https://bugs.webkit.org/show_bug.cgi?id=90286

Breaks compile on clang error: in-class initializer for static
data member of type 'const float' is a GNU extension
[-Werror,-Wgnu]

Source/WebCore:

* dom/ViewportArguments.h:
(ViewportArguments):

LayoutTests:

* platform/efl/TestExpectations:
* platform/gtk/TestExpectations:
* platform/qt/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121651 268f45cc-cd09-0410-ab3c-d52691b4dbfc