[Qt][EFL] Rename from xxxContentsScale() to xxxScale() in PageViewportController.
https://bugs.webkit.org/show_bug.cgi?id=106537

Patch by Huang Dongsung <luxtella@company100.net> on 2013-01-10
Reviewed by Kenneth Rohde Christiansen.

Rename 3 methods to match the terms of ViewportAttributes.

* UIProcess/API/qt/qwebkittest.cpp:
(QWebKitTest::viewport):
(QWebKitTest::contentsScale):
* UIProcess/PageViewportController.h:
(WebKit::PageViewportController::minimumScale):
(WebKit::PageViewportController::maximumScale):
(WebKit::PageViewportController::currentScale):
* UIProcess/qt/PageViewportControllerClientQt.cpp:
(WebKit::PageViewportControllerClientQt::zoomToAreaGestureEnded):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139380 268f45cc-cd09-0410-ab3c-d52691b4dbfc