[QT][EFL][WK2] Rename scale members in PageViewportController.
https://bugs.webkit.org/show_bug.cgi?id=106499

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

Rename from m_contentsScale to m_pageScaleFactor and from devicePixelRatio() to
deviceScaleFactor() to match terms of WebCore.

* UIProcess/API/qt/qwebkittest.cpp:
(QWebKitTest::devicePixelRatio):
* UIProcess/PageViewportController.cpp:
(WebKit::PageViewportController::PageViewportController):
(WebKit::PageViewportController::deviceScaleFactor):
(WebKit::PageViewportController::pixelAlignedFloatPoint):
(WebKit::PageViewportController::boundContentsPosition):
(WebKit::PageViewportController::didRenderFrame):
(WebKit::PageViewportController::didChangeContentsVisibility):
(WebKit::PageViewportController::syncVisibleContents):
(WebKit::PageViewportController::visibleContentsSize):
(WebKit::PageViewportController::applyScaleAfterRenderingContents):
(WebKit::PageViewportController::updateMinimumScaleToFit):
* UIProcess/PageViewportController.h:
(PageViewportController):
(WebKit::PageViewportController::currentContentsScale):
* UIProcess/efl/PageViewportControllerClientEfl.cpp:
(WebKit::PageViewportControllerClientEfl::updateViewportSize):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139274 268f45cc-cd09-0410-ab3c-d52691b4dbfc