Initial PaintInvalidationState support for SVG

Extend PaintInvalidationState with a transform, to allow computing the
position/area of an SVG object first within the (outermost) SVG root, and
then relative to the document.
Handling of PaintInvalidationState is added only to RenderSVGModelObject-
derived render objects for now.

BUG=391054

Review URL: https://codereview.chromium.org/598623002

git-svn-id: svn://svn.chromium.org/blink/trunk@182799 bbb929c8-8fbe-4397-9dbb-9b2b20218538
6 files changed
tree: fe1bbf1dedd5fe17c2e252b4dd5d0c72d541bc17
  1. third_party/