Frame::scalePage() results in visual artifacts with scale factors less than 1
-and corresponding-
<rdar://problem/8683230>

Reviewed by Dan Bernstein.

Source/WebCore: 

Fall into the case where we fill with a background base color when there is a page 
scale factor that is less than 1.
* rendering/RenderView.cpp:
(WebCore::RenderView::paintBoxDecorations):

LayoutTests: 

* fast/repaint/scale-page-shrink.html: Added.
* platform/gtk/Skipped:
* platform/mac/fast/repaint/scale-page-shrink-expected.checksum: Added.
* platform/mac/fast/repaint/scale-page-shrink-expected.png: Added.
* platform/mac/fast/repaint/scale-page-shrink-expected.txt: Added.
* platform/qt/Skipped:
* platform/win/Skipped:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@83140 268f45cc-cd09-0410-ab3c-d52691b4dbfc