Remove deviceScaleFactor argument in computeMinimumScaleFactorForContentContained().
https://bugs.webkit.org/show_bug.cgi?id=106500

Patch by Huang Dongsung <luxtella@company100.net> on 2013-01-09
Reviewed by Kenneth Rohde Christiansen.

deviceScaleFactor argument is not used after r139189.

Source/WebCore:

No new tests. Refactoring only.

* dom/ViewportArguments.cpp:
(WebCore::computeMinimumScaleFactorForContentContained):
* dom/ViewportArguments.h:
(WebCore):

Source/WebKit2:

* UIProcess/PageViewportController.cpp:
(WebKit::PageViewportController::updateMinimumScaleToFit):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139275 268f45cc-cd09-0410-ab3c-d52691b4dbfc