[EFL] [GTK] [QT] fast/viewport/viewport-91.html is failing after r121555

[EFL] [GTK] [QT] fast/viewport/viewport-91.html is failing after r121555
https://bugs.webkit.org/show_bug.cgi?id=90286

Patch by Konrad Piascik <kpiascik@rim.com> on 2012-07-02
Reviewed by Daniel Bates.

Source/WebCore:

Since the deprecatedTargetDPI was an int and the deviceDPI was also an int the result
was truncated.  Changed deprecatedTargetDPI to a float value. Viewport test 91 now passes.

* dom/ViewportArguments.h:
(ViewportArguments):

LayoutTests:

Unskip now passing tests.

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

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121661 268f45cc-cd09-0410-ab3c-d52691b4dbfc