Subpixel Layout: SimpleLineLayout needs more position rounding to match InlineFlowBox layout.

https://bugs.webkit.org/show_bug.cgi?id=127404

Reviewed by Antti Koivisto.

In order to produce a CSS pixel perfect layout, SimpleLineLayout needs to
round line positions to CSS (integral) position similarly to InlineFlowBox.

Source/WebCore:

Existing tests cover it.

* rendering/SimpleLineLayoutResolver.h:
(WebCore::SimpleLineLayout::RunResolver::Run::rect):
(WebCore::SimpleLineLayout::RunResolver::Run::baseline):

LayoutTests:

* platform/mac/css1/box_properties/padding-expected.txt:
* platform/mac/css1/box_properties/padding_top-expected.txt:
* platform/mac/css1/formatting_model/vertical_formatting-expected.txt:
* platform/mac/css2.1/t080301-c411-vt-mrgn-00-b-expected.txt:
* platform/mac/css2.1/t0804-c5510-padn-00-b-ag-expected.txt:
* platform/mac/css2.1/t0905-c414-flt-wrap-00-e-expected.txt:
* platform/mac/fast/css/empty-pseudo-class-expected.txt:
* platform/mac/fast/css/fieldset-display-row-expected.txt:
* platform/mac/fast/css/first-child-pseudo-class-expected.txt:
* platform/mac/fast/css/last-child-pseudo-class-expected.txt:
* platform/mac/fast/css/only-child-pseudo-class-expected.txt:
* platform/mac/fast/repaint/reflection-redraw-expected.txt:
* platform/mac/fast/shapes/shape-inside/shape-inside-subpixel-rectangle-top-expected.png: Removed.
* platform/mac/fast/table/dynamic-caption-add-remove-before-child-expected.txt:
* platform/mac/fast/table/multiple-captions-display-expected.txt:
* platform/mac/tables/mozilla/marvin/body_col-expected.txt:
* platform/mac/tables/mozilla/marvin/x_th_valign_baseline-expected.txt:
* platform/mac/tables/mozilla/other/body_col-expected.txt:
* platform/mac/tables/mozilla_expected_failures/bugs/bug10140-expected.txt:
* platform/mac/tables/mozilla_expected_failures/bugs/bug10216-expected.txt:
* platform/mac/tables/mozilla_expected_failures/core/captions3-expected.txt:
* platform/mac/tables/mozilla_expected_failures/other/test4-expected.txt:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@162553 268f45cc-cd09-0410-ab3c-d52691b4dbfc