Don't include nested outlines when computing repaint rects for SVG objects

Don't include nested outlines when computing repaint rects for SVG objects

Because the paint invalidation rect is inflated in
SVGRenderSupport::computeFloatRectForPaintInvalidation, rather than in
clippedOverflowRectForPaintInvalidation (for example) the repaint rect
being computed includes outlines from all (SVG) ancestors.
Hoist the 'inflation' out of computeFloatRectForPaintInvalidation (both
the SVGRenderSupport one and its callers).

BUG=417729
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182744

[fs, 2014-09-25 16:05:42]

fs@opera.com changed reviewers:
+ fmalita@chromium.org, pdr@chromium.org, schenney@chromium.org

[fs, 2014-09-25 16:05:42]

Discovered while working on https://codereview.chromium.org/598623002/. Could
probably be taken further, but it seemed more safe to leave it at this for now.

[f(malita), 2014-09-25 16:53:02]

lgtm

[fs, 2014-09-26 08:25:59]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2014-09-26 08:26:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/609463002/1

[commit-bot: I haz the power, 2014-09-26 09:16:29]

Committed patchset #1 (id:1) as 182744