Synthesize preserveAspectRatio='none' for non-viewBoxed <img>
For SVGs embedded in an image context, we will synthesize a viewBox that
matches the intrinsic dimensions of the SVGs, if no viewBox is
specified. This would result in an image where the aspect ratio
expressed by the intrinsic dimensions would be preserved.
This does not appear to match author expectations - they rather see that
the behavior in these cases match that of a "regular" raster-based
image. To achieve this, also synthesize a preserveAspectRatio-value of
"none" in these cases. This will result in the original image being
stretched in the most common cases. Any percentage dimensions will be
resolved against the computed dimensions (replaced size), and can hence
also produce a useful viewBox.
The implemented behavior is not currently specced (neither was the old
synthesizing of a viewBox), but matches Gecko.
BUG=110195
Review-Url: https://codereview.chromium.org/2290173005
Cr-Commit-Position: refs/heads/master@{#416059}
23 files changed
