Fix cull rect computation for SVG{Container,Image,Shape}Painter outlines

Source/core/paint/ObjectPainter.cpp

Index: Source/core/paint/ObjectPainter.cpp
diff --git a/Source/core/paint/ObjectPainter.cpp b/Source/core/paint/ObjectPainter.cpp
index 37886757c15136eb1bebe76af7fa091ca88faa3d..f19c01892d199ee8763ab54e5adafa280c1f9f1f 100644
--- a/Source/core/paint/ObjectPainter.cpp
+++ b/Source/core/paint/ObjectPainter.cpp
@@ -15,6 +15,18 @@
 
 namespace blink {
 
+LayoutRect ObjectPainter::outlineBounds(const LayoutRect& objectBounds, const ComputedStyle& style)
+{
+    int outlineOutset;
+    if (style.outlineStyleIsAuto())
+        outlineOutset = GraphicsContext::focusRingOutsetExtent(style.outlineOffset(), style.outlineWidth());
+    else
+        outlineOutset = style.outlineSize();

[fs, 2015/06/08 16:30:51]

This pattern appears to pop up here and there... Maybe it should be moved to
ComputedStyle?

[chrishtr, 2015/06/08 22:59:41]

Sure...do as a followup maybe?

+    LayoutRect outlineBounds(objectBounds);
+    outlineBounds.inflate(outlineOutset);
+    return outlineBounds;
+}
+
 void ObjectPainter::paintFocusRing(const PaintInfo& paintInfo, const ComputedStyle& style, const Vector<LayoutRect>& focusRingRects)
 {
     ASSERT(style.outlineStyleIsAuto());