move common blur types into central header

src/animator/SkDrawBlur.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkDrawBlur.h"
 
 #if SK_USE_CONDENSED_INFO == 0
 
 const SkMemberInfo SkDrawBlur::fInfo[] = {
     SK_MEMBER(fBlurStyle, MaskFilterBlurStyle),
     SK_MEMBER(fSigma, Float)
 };
 
 #endif
 
 DEFINE_GET_MEMBER(SkDrawBlur);
 
 SkDrawBlur::SkDrawBlur()
     : fSigma(-1)
-    , fBlurStyle(SkBlurMaskFilter::kNormal_BlurStyle) {
+    , fBlurStyle(kNormal_SkBlurStyle) {
 }
 
 SkMaskFilter* SkDrawBlur::getMaskFilter() {
-    if (fSigma < 0)
+    if (fSigma <= 0) {
         return NULL;
-    return SkBlurMaskFilter::Create((SkBlurMaskFilter::BlurStyle) fBlurStyle, fSigma);
+    }
+    return SkBlurMaskFilter::Create((SkBlurStyle)fBlurStyle, fSigma);
 }