Subpixel layout: Convert RenderTable* and AutoTableLayout to use LayoutUnit.

https://bugs.webkit.org/show_bug.cgi?id=149366

Reviewed by David Hyatt.

Source/WebCore:

This patch enables non-integral cell space distribution for both
auto and fixed table layout.
Due to the tight layout, float is used to calculate each cell's dimension/position and
we convert them to LayoutUnits while said values are set on the renderer.
Due to the (lack of) LayoutUnit precision, a fudge factor is applied on table cell's minimum width.

Collapsed table borders are still integral based, tracked here: webkit.org/b/150383

Covered by existing tests.

(WebCore::RenderTableSection::firstLineBaseline): Baseline is still integral (same as normal line layout)
* rendering/RenderTreeAsText.cpp: flooring produces the least amount of rebaseline diff (still over 1200 tests). It doesn't really matter which direction we round
as long as it is consistent.
(WebCore::writeTextRun):
(WebCore::writeSimpleLine):
* platform/graphics/LayoutRect.h:
(WebCore::LayoutRect::LayoutRect):
* rendering/AutoTableLayout.cpp:
(WebCore::AutoTableLayout::recalcColumn):
(WebCore::AutoTableLayout::computeIntrinsicLogicalWidths):
(WebCore::AutoTableLayout::applyPreferredLogicalWidthQuirks):
(WebCore::AutoTableLayout::calcEffectiveLogicalWidth):
(WebCore::AutoTableLayout::layout):
* rendering/AutoTableLayout.h:
* rendering/FixedTableLayout.cpp:
(WebCore::FixedTableLayout::calcWidthArray):
(WebCore::FixedTableLayout::applyPreferredLogicalWidthQuirks):
(WebCore::FixedTableLayout::layout):
* rendering/FixedTableLayout.h:
* rendering/RenderBlock.cpp:
(WebCore::RenderBlock::computePreferredLogicalWidths):
* rendering/RenderTable.cpp:
(WebCore::RenderTable::updateLogicalWidth):
(WebCore::RenderTable::distributeExtraLogicalHeight):
(WebCore::RenderTable::layout):
(WebCore::RenderTable::addOverflowFromChildren):
(WebCore::RenderTable::computePreferredLogicalWidths):
(WebCore::RenderTable::offsetWidthForColumn):
(WebCore::RenderTable::calcBorderStart):
(WebCore::RenderTable::calcBorderEnd):
(WebCore::RenderTable::outerBorderBefore):
(WebCore::RenderTable::outerBorderAfter):
(WebCore::RenderTable::outerBorderStart):
(WebCore::RenderTable::outerBorderEnd):
* rendering/RenderTable.h:
(WebCore::RenderTable::hBorderSpacing):
(WebCore::RenderTable::vBorderSpacing):
(WebCore::RenderTable::outerBorderLeft):
(WebCore::RenderTable::outerBorderRight):
(WebCore::RenderTable::outerBorderTop):
(WebCore::RenderTable::outerBorderBottom):
(WebCore::RenderTable::columnPositions):
(WebCore::RenderTable::setColumnPosition):
* rendering/RenderTableCell.cpp:
(WebCore::RenderTableCell::logicalWidthFromColumns):
(WebCore::RenderTableCell::computeIntrinsicPadding):
(WebCore::RenderTableCell::setCellLogicalWidth):
(WebCore::RenderTableCell::layout):
(WebCore::RenderTableCell::paddingTop):
(WebCore::RenderTableCell::paddingBottom):
(WebCore::RenderTableCell::paddingLeft):
(WebCore::RenderTableCell::paddingRight):
(WebCore::RenderTableCell::paddingBefore):
(WebCore::RenderTableCell::paddingAfter):
(WebCore::RenderTableCell::clippedOverflowRectForRepaint):
(WebCore::RenderTableCell::borderLeft):
(WebCore::RenderTableCell::borderRight):
(WebCore::RenderTableCell::borderTop):
(WebCore::RenderTableCell::borderBottom):
(WebCore::RenderTableCell::borderStart):
(WebCore::RenderTableCell::borderEnd):
(WebCore::RenderTableCell::borderBefore):
(WebCore::RenderTableCell::borderAfter):
(WebCore::RenderTableCell::borderHalfLeft):
(WebCore::RenderTableCell::borderHalfRight):
(WebCore::RenderTableCell::borderHalfTop):
(WebCore::RenderTableCell::borderHalfBottom):
(WebCore::RenderTableCell::borderHalfStart):
(WebCore::RenderTableCell::borderHalfEnd):
(WebCore::RenderTableCell::borderHalfBefore):
(WebCore::RenderTableCell::borderHalfAfter):
(WebCore::CollapsedBorders::addBorder):
(WebCore::RenderTableCell::paintCollapsedBorders):
(WebCore::RenderTableCell::paintBackgroundsBehindCell):
(WebCore::RenderTableCell::paintBoxDecorations):
(WebCore::RenderTableCell::paintMask):
* rendering/RenderTableCell.h:
(WebCore::RenderTableCell::logicalHeightForRowSizing):
* rendering/RenderTableSection.cpp:
(WebCore::RenderTableSection::calcRowLogicalHeight):
(WebCore::RenderTableSection::layout):
(WebCore::RenderTableSection::distributeExtraLogicalHeightToPercentRows):
(WebCore::RenderTableSection::distributeExtraLogicalHeightToAutoRows):
(WebCore::RenderTableSection::distributeRemainingExtraLogicalHeight):
(WebCore::RenderTableSection::distributeExtraLogicalHeightToRows):
(WebCore::RenderTableSection::layoutRows):
(WebCore::RenderTableSection::calcOuterBorderBefore):
(WebCore::RenderTableSection::calcOuterBorderAfter):
(WebCore::RenderTableSection::calcOuterBorderStart):
(WebCore::RenderTableSection::calcOuterBorderEnd):
(WebCore::RenderTableSection::logicalRectForWritingModeAndDirection):
(WebCore::RenderTableSection::dirtiedColumns):
(WebCore::RenderTableSection::spannedColumns):
(WebCore::RenderTableSection::offsetLeftForRowGroupBorder):
(WebCore::RenderTableSection::offsetTopForRowGroupBorder):
(WebCore::RenderTableSection::verticalRowGroupBorderHeight):
(WebCore::RenderTableSection::horizontalRowGroupBorderWidth):
(WebCore::RenderTableSection::paintRowGroupBorderIfRequired):
(WebCore::RenderTableSection::setLogicalPositionForCell):
* rendering/RenderTableSection.h:
(WebCore::RenderTableSection::outerBorderLeft):
(WebCore::RenderTableSection::outerBorderRight):
(WebCore::RenderTableSection::outerBorderTop):
(WebCore::RenderTableSection::outerBorderBottom):
* rendering/style/CollapsedBorderValue.h:
(WebCore::CollapsedBorderValue::CollapsedBorderValue):
(WebCore::CollapsedBorderValue::width):

LayoutTests:

Changeset (due to the massive rebaselining) is too long to list.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@191623 268f45cc-cd09-0410-ab3c-d52691b4dbfc