Merge 129370 - snapToSize rounds the incorrectly for negative locations

LayoutTests/platform/wk2/Skipped

 #
 # Copyright (C) 2010 Apple Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 #
 # 1.  Redistributions of source code must retain the above copyright
 #     notice, this list of conditions and the following disclaimer. 
 # 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 80 matching lines @@
 fast/sub-pixel/inline-block-with-margin.html
 fast/sub-pixel/inline-block-with-padding.html
 fast/sub-pixel/large-sizes.html
 fast/sub-pixel/layout-boxes-with-zoom.html
 fast/sub-pixel/position-right-aligns-with-container.html
 fast/sub-pixel/selection/selection-gaps-at-fractional-offsets.html
 fast/sub-pixel/size-of-box-with-zoom.html
 fast/sub-pixel/table-rows-no-gaps.html
 fast/sub-pixel/sub-pixel-accumulates-to-layers.html
 fast/sub-pixel/selection/selection-rect-in-sub-pixel-table.html
+fast/sub-pixel/snap-negative-location.html
 
 # [WK2][WTR] svg/animations/animate-text-nested-transforms.html fails
 # https://bugs.webkit.org/show_bug.cgi?id=95191
 svg/animations/animate-text-nested-transforms.html
 
 # WebKit2 needs layoutTestController.overridePreference
 # <https://bugs.webkit.org/show_bug.cgi?id=42197>
 fast/canvas/webgl/framebuffer-object-attachment.html
 fast/canvas/webgl/gl-vertex-attrib-zero-issues.html
 fast/canvas/webgl/gl-getshadersource.html
@@ skipping 1108 matching lines @@
 ########################################
 
 
 ###### This file has four sections. When adding new tests, make sure to
 ###### add to the right section:
 
 ### (1) Classified failures with bug reports
 ### (2) Classified failures without bug reports (yet)
 ### (3) Unclassified failures
 ### (4) Features that are not supported in WebKit2 and likely never will be