Push sigma-based blur interface into our GMs/benches/tests/samplecode

https://codereview.chromium.org/23701006/



git-svn-id: http://skia.googlecode.com/svn/trunk@11129 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/animator/SkDrawBlur.h b/src/animator/SkDrawBlur.h
index 24cb4ae..0c916a3 100644
--- a/src/animator/SkDrawBlur.h
+++ b/src/animator/SkDrawBlur.h
@@ -16,10 +16,12 @@
 class SkDrawBlur : public SkDrawMaskFilter {
     DECLARE_DRAW_MEMBER_INFO(Blur);
     SkDrawBlur();
-    virtual SkMaskFilter* getMaskFilter();
+    virtual SkMaskFilter* getMaskFilter() SK_OVERRIDE;
 protected:
-    SkScalar radius;
-    int /*SkBlurMaskFilter::BlurStyle*/ blurStyle;
+    SkScalar fSigma;
+    int /*SkBlurMaskFilter::BlurStyle*/ fBlurStyle;
+
+    typedef SkDrawMaskFilter INHERITED;
 };
 
 #endif // SkDrawBlur_DEFINED