[CSS Grid Layout] Relayout whenever Box Alignment properties change

[CSS Grid Layout] Relayout whenever Box Alignment properties change
https://bugs.webkit.org/show_bug.cgi?id=148070

Reviewed by Darin Adler.

Source/WebCore:

We were Reattaching the styles to the RenderTree whenever Content Alignment
properties (align-items and justify-items) changed their values, since the
Self Alignment properties depend on such values to resolve 'auto' values
during layout.

This patch removes such restriction, since we resolve the auto values
whenever we access the alignment properties. The only thing we need to
do is to mark a grid item for layout whenever the Default Alignment
properties change from/to stretch, since it implies a resize of the grid
items using 'auto' values for the Self Alignment properties.

Tests: fast/css-grid-layout/relayout-align-items-changed.html
       fast/css-grid-layout/relayout-align-self-changed.html
       fast/css-grid-layout/relayout-justify-items-changed.html
       fast/css-grid-layout/relayout-justify-self-changed.html
       fast/repaint/align-items-change.html
       fast/repaint/align-items-overflow-change.html
       fast/repaint/align-self-change.html
       fast/repaint/align-self-overflow-change.html
       fast/repaint/justify-items-change.html
       fast/repaint/justify-items-legacy-change.html
       fast/repaint/justify-items-overflow-change.html
       fast/repaint/justify-self-change.html
       fast/repaint/justify-self-overflow-change.html

* rendering/RenderGrid.cpp:
(WebCore::defaultAlignmentIsStretch):
(WebCore::RenderGrid::styleDidChange):
* rendering/RenderGrid.h:
* rendering/style/RenderStyle.cpp:
(WebCore::RenderStyle::resolveAlignmentOverflow):
(WebCore::RenderStyle::changeRequiresLayout):
* style/StyleResolveTree.cpp:
(WebCore::Style::determineChange): Deleted.

LayoutTests:

Tests to verify we force a layout of grid container or grid items, as appropriated,
whenever Box Alignment properties change their value.

This patch also adds some repaint tests, so we can ensure we generate the correct
repaint rects as well.

* fast/css-grid-layout/relayout-align-items-changed-expected.txt: Added.
* fast/css-grid-layout/relayout-align-items-changed.html: Added.
* fast/css-grid-layout/relayout-align-self-changed-expected.txt: Added.
* fast/css-grid-layout/relayout-align-self-changed.html: Added.
* fast/css-grid-layout/relayout-justify-items-changed-expected.txt: Added.
* fast/css-grid-layout/relayout-justify-items-changed.html: Added.
* fast/css-grid-layout/relayout-justify-self-changed-expected.txt: Added.
* fast/css-grid-layout/relayout-justify-self-changed.html: Added.
* fast/repaint/align-items-change-expected.txt: Added.
* fast/repaint/align-items-change.html: Added.
* fast/repaint/align-items-overflow-change-expected.txt: Added.
* fast/repaint/align-items-overflow-change.html: Added.
* fast/repaint/align-self-change-expected.txt: Added.
* fast/repaint/align-self-change.html: Added.
* fast/repaint/align-self-overflow-change-expected.txt: Added.
* fast/repaint/align-self-overflow-change.html: Added.
* fast/repaint/justify-items-change-expected.txt: Added.
* fast/repaint/justify-items-change.html: Added.
* fast/repaint/justify-items-legacy-change-expected.txt: Added.
* fast/repaint/justify-items-legacy-change.html: Added.
* fast/repaint/justify-items-overflow-change-expected.txt: Added.
* fast/repaint/justify-items-overflow-change.html: Added.
* fast/repaint/justify-self-change-expected.txt: Added.
* fast/repaint/justify-self-change.html: Added.
* fast/repaint/justify-self-overflow-change-expected.txt: Added.
* fast/repaint/justify-self-overflow-change.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@189910 268f45cc-cd09-0410-ab3c-d52691b4dbfc