An inline element with an absolutely positioned child does not correctly calculate/render padding and margin
https://bugs.webkit.org/show_bug.cgi?id=47554

Reviewed by David Hyatt.

Source/WebCore:

When looking for padding/margin to add from the start of a child's parent skip past any leading positioned siblings as
we don't add the padding/margin of the common parent when skipping past them in |skipLeadingWhitespace|. We
don't need to worry about the case of trailing positioned objects as we will account for their parent's
border/margin/padding when we encounter them in |nextSegmentBreak|.

Test: fast/inline/padding-before-leading-positioned-element-contributes-width.html

* rendering/RenderBlockLineLayout.cpp:
(WebCore::previousInFlowSibling):
(WebCore):
(WebCore::inlineLogicalWidth):

LayoutTests:

* fast/inline/padding-before-leading-positioned-element-contributes-width-expected.txt: Added.
* fast/inline/padding-before-leading-positioned-element-contributes-width.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148453 268f45cc-cd09-0410-ab3c-d52691b4dbfc