Added getConservativeBound helper function to GrClipData

http://codereview.appspot.com/6454054/



git-svn-id: http://skia.googlecode.com/svn/trunk@4798 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrSoftwarePathRenderer.cpp b/src/gpu/GrSoftwarePathRenderer.cpp
index 0bf1cab..5b570b4 100644
--- a/src/gpu/GrSoftwarePathRenderer.cpp
+++ b/src/gpu/GrSoftwarePathRenderer.cpp
@@ -46,10 +46,7 @@
     }
     *pathBounds = GrIRect::MakeWH(rt->width(), rt->height());
 
-    const GrClipData* clipData = target->getClip();
-
-    SkRect conservativeBounds = clipData->fClipStack->getConservativeBounds();
-    conservativeBounds.roundOut(clipBounds);
+    target->getClip()->getConservativeBounds(rt, clipBounds);
     if (!pathBounds->intersect(*clipBounds)) {
         return false;
     }