Prepare SVGImage for the default sizing algorithm
This patch aligns sizing in SVGImage with sizing done in
LayoutBoxModelObject::calculateImageIntrinsicDimensions()
Split SVGImage::containerSize() into two parts. On part that
calculates the concrete size.
The other part return containerSize(), with concrete object size as
fall-back for direct SVGImage::draw() users (webgl being the only one
known).
The long term plan is to only keep this sizing implementation and
remove the one in LayoutBoxModelObject. As long as SVG is the only
user of the complex version of the algorithm it makes sense to keep it
as SVG-only code.
BUG=581357
Review URL: https://codereview.chromium.org/1695243004
Cr-Commit-Position: refs/heads/master@{#376965}
3 files changed
