move common blur types into central header

BUG=skia:
R=scroggo@google.com, djsollen@google.com

Author: reed@google.com

Review URL: https://codereview.chromium.org/253833002

git-svn-id: http://skia.googlecode.com/svn/trunk@14411 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleFuzz.cpp b/samplecode/SampleFuzz.cpp
index e66f086..e690df1 100644
--- a/samplecode/SampleFuzz.cpp
+++ b/samplecode/SampleFuzz.cpp
@@ -190,9 +190,8 @@
 
     case 7:
       if (quick == true) break;
-          SkSafeUnref(paint.setMaskFilter(SkBlurMaskFilter::Create(
-                                                  SkBlurMaskFilter::kNormal_BlurStyle,
-                                                  make_number())));
+          SkSafeUnref(paint.setMaskFilter(SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
+                                                                   make_number())));
       break;
 
     case 8: