remove deprecated use of porterduff enum



git-svn-id: http://skia.googlecode.com/svn/trunk@235 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SamplePathEffects.cpp b/samplecode/SamplePathEffects.cpp
index e2b5f5a..c974850 100644
--- a/samplecode/SamplePathEffects.cpp
+++ b/samplecode/SamplePathEffects.cpp
@@ -251,8 +251,8 @@
             paint.setAntiAlias(true);
             paint.setAlpha(0x80);
             paint.setColorFilter(
-                SkColorFilter::CreatePorterDuffFilter(
-                    SkColorSetARGB(0x44, 0, 0xFF, 0), SkPorterDuff::kSrcATop_Mode))->unref();
+                SkColorFilter::CreateModeFilter(
+                    SkColorSetARGB(0x44, 0, 0xFF, 0), SkXfermode::kSrcATop_Mode))->unref();
             
             bounds.set(SkIntToScalar(10), SkIntToScalar(10), SkIntToScalar(150), SkIntToScalar(70));
             canvas->saveLayer(&bounds, &paint,