Changing tests to be consistent and use self.scm rather then recreating the scm object.
https://bugs.webkit.org/show_bug.cgi?id=106536

Patch by Tim 'mithro' Ansell <mithro@mithis.com> on 2013-01-10
Reviewed by Eric Seidel.

* Scripts/webkitpy/common/checkout/scm/scm_unittest.py:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139299 268f45cc-cd09-0410-ab3c-d52691b4dbfc
REGRESSION(r139189): pixel alignment must be performed in device units.
https://bugs.webkit.org/show_bug.cgi?id=106504

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

After r139189, pixel alignment is performed in UI units. If deviceScaleFactor is
fractional number, adjusted scroll position can blur non-composited layer.

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

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139300 268f45cc-cd09-0410-ab3c-d52691b4dbfc