move common blur types into central header

samplecode/SampleBlur.cpp

Index: samplecode/SampleBlur.cpp
diff --git a/samplecode/SampleBlur.cpp b/samplecode/SampleBlur.cpp
index a918bf217b7d9a9582e36018fe1b74d9057d2bc0..7607dfc9f33db6830c9be1fa78c4a692bebfe7cb 100644
--- a/samplecode/SampleBlur.cpp
+++ b/samplecode/SampleBlur.cpp
@@ -76,16 +76,16 @@ protected:
     virtual void onDrawContent(SkCanvas* canvas) {
         drawBG(canvas);
 
-        SkBlurMaskFilter::BlurStyle NONE = SkBlurMaskFilter::BlurStyle(-999);
+        SkBlurStyle NONE = SkBlurStyle(-999);
         static const struct {
-            SkBlurMaskFilter::BlurStyle fStyle;
-            int                         fCx, fCy;
+            SkBlurStyle fStyle;
+            int         fCx, fCy;
         } gRecs[] = {
             { NONE,                                 0,  0 },
-            { SkBlurMaskFilter::kInner_BlurStyle,  -1,  0 },
-            { SkBlurMaskFilter::kNormal_BlurStyle,  0,  1 },
-            { SkBlurMaskFilter::kSolid_BlurStyle,   0, -1 },
-            { SkBlurMaskFilter::kOuter_BlurStyle,   1,  0 },
+            { kInner_SkBlurStyle,  -1,  0 },
+            { kNormal_SkBlurStyle,  0,  1 },
+            { kSolid_SkBlurStyle,   0, -1 },
+            { kOuter_SkBlurStyle,   1,  0 },
         };
 
         SkPaint paint;
@@ -111,7 +111,7 @@ protected:
             }
             // draw text
             {
-                SkMaskFilter* mf = SkBlurMaskFilter::Create(SkBlurMaskFilter::kNormal_BlurStyle,
+                SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
                                       SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(4)),
                                       flags);
                 paint.setMaskFilter(mf)->unref();