[SVG] Poor filter resolution when using CSS 3D transforms.

calculateTransformationToOutermostCoordinateSystem() should stop at the
first composited layer to match its backing resolution. Currently, we
are incorrectly taking the layer transform into account (the stop
condition is off by one).

R=pdr@chromium.org,schenney@chromium.org,senorblanco@chromium.org

BUG=345441

Review URL: https://codereview.chromium.org/196413023

git-svn-id: svn://svn.chromium.org/blink/trunk@169472 bbb929c8-8fbe-4397-9dbb-9b2b20218538