add optional cull-rect to patheffects, so they can do less work if their results
lie outside of the current clip-bounds (the cull rect).
Review URL: https://codereview.appspot.com/7206044

git-svn-id: http://skia.googlecode.com/svn/trunk@7378 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/ClockFaceView.cpp b/samplecode/ClockFaceView.cpp
index 9a46e80..a182f4d 100644
--- a/samplecode/ClockFaceView.cpp
+++ b/samplecode/ClockFaceView.cpp
@@ -110,7 +110,7 @@
 public:
     InverseFillPE() {}
     virtual bool filterPath(SkPath* dst, const SkPath& src,
-                            SkStrokeRec*) const SK_OVERRIDE {
+                            SkStrokeRec*, const SkRect*) const SK_OVERRIDE {
         *dst = src;
         dst->setFillType(SkPath::kInverseWinding_FillType);
         return true;
@@ -198,7 +198,7 @@
         SkStrokeRec rec(SkStrokeRec::kFill_InitStyle);
         SkPath path, dstPath;
         orig.getTextPath("9", 1, 0, 0, &path);
-        pe->filterPath(&dstPath, path, &rec);
+        pe->filterPath(&dstPath, path, &rec, NULL);
 
         SkPaint p;
         p.setAntiAlias(true);