https://bugs.webkit.org/show_bug.cgi?id=99216

Patch by Hans Muller <hmuller@adobe.com> on 2012-10-18
Reviewed by Dirk Schulze.

Added a FloatRect::extend() method which simplifies writing loops that
accumulate the bounding box for a sequence of FloatPoints. The new method
is used by ExclusionPolygon to initialize the shape's logical and physical
bounding boxes. This a clean-up, not a change in functionality. It's already
covered by the existing fast/exclusions LayoutTests.

* platform/graphics/FloatRect.cpp:
(WebCore::FloatRect::extend): Extend the FloatRect's bounds to include a FloatPoint.
(WebCore):
* platform/graphics/FloatRect.h:
(FloatRect): Added extend() method.
* rendering/ExclusionPolygon.cpp:
(WebCore::ExclusionPolygon::ExclusionPolygon): Use FloatRect::extend() to compute the polygon's internal bounding box.
* rendering/ExclusionShape.cpp:
(WebCore::ExclusionShape::createExclusionShape): Use FloatRect::extend() to compute the polygon's physical bounding box.
* rendering/ExclusionShape.h:
(WebCore::ExclusionShape::shapeBoundingBox): Return the shape's bounding box in physical coordinates.
(ExclusionShape):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@131768 268f45cc-cd09-0410-ab3c-d52691b4dbfc