Fixes feComponentTransfer and feColorMatrix's treatment of pixels outside input region.

Previously these two primitives would ignore pixels in their primitive region but outside the input region
which causes the filters to have incorrect results in the cases where the transformation turns transparent
pixels into visible.

BUG=330602

Review URL: https://codereview.chromium.org/116133003

git-svn-id: svn://svn.chromium.org/blink/trunk@164602 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Tighten up RootInlineBox creation to RenderBlockFlow

All line layout work should be relegated to RenderBlockFlow,
not RenderBlock. This is just another baby step towards
being able to remove the line box tree pointer from RenderBlock.

BUG=302024

Review URL: https://codereview.chromium.org/93513012

git-svn-id: svn://svn.chromium.org/blink/trunk@164603 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Make RenderBlockRareData 16 bytes rather than 20 bytes

Review URL: https://codereview.chromium.org/123413002

git-svn-id: svn://svn.chromium.org/blink/trunk@164604 bbb929c8-8fbe-4397-9dbb-9b2b20218538