move common blur types into central header

samplecode/SampleAnimBlur.cpp

Index: samplecode/SampleAnimBlur.cpp
diff --git a/samplecode/SampleAnimBlur.cpp b/samplecode/SampleAnimBlur.cpp
index 5d6638ad8773d213826377d3cb8a6f0a0decc77e..e00c46ddd19a660a93600231a97028ed418ec3bf 100644
--- a/samplecode/SampleAnimBlur.cpp
+++ b/samplecode/SampleAnimBlur.cpp
@@ -37,11 +37,11 @@ protected:
                                                              25 * SK_Scalar1,
                                                              3 * SK_Scalar1);
 
-        static const SkBlurMaskFilter::BlurStyle gStyles[] = {
-            SkBlurMaskFilter::kNormal_BlurStyle,
-            SkBlurMaskFilter::kInner_BlurStyle,
-            SkBlurMaskFilter::kSolid_BlurStyle,
-            SkBlurMaskFilter::kOuter_BlurStyle,
+        static const SkBlurStyle gStyles[] = {
+            kNormal_SkBlurStyle,
+            kInner_SkBlurStyle,
+            kSolid_SkBlurStyle,
+            kOuter_SkBlurStyle,
         };
         SkRandom random;