Made "Clip" sample use AA clipping

http://codereview.appspot.com/6176046/



git-svn-id: http://skia.googlecode.com/svn/trunk@3834 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleClip.cpp b/samplecode/SampleClip.cpp
index 570f0b9..fd3f1fd 100644
--- a/samplecode/SampleClip.cpp
+++ b/samplecode/SampleClip.cpp
@@ -147,7 +147,7 @@
             canvas->save();
             for (size_t i = 0; i < SK_ARRAY_COUNT(gProc); ++i) {
                 canvas->save();
-                canvas->clipPath(clipPath, SkRegion::kIntersect_Op, true);
+                canvas->clipPath(clipPath, SkRegion::kIntersect_Op, SkToBool(aa));
 //                canvas->drawColor(SK_ColorWHITE);
                 gProc[i](canvas, SkToBool(aa));
                 canvas->restore();