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

samplecode/SampleBlur.cpp

Index: samplecode/SampleBlur.cpp
===================================================================
--- samplecode/SampleBlur.cpp	(revision 11108)
+++ samplecode/SampleBlur.cpp	(working copy)
@@ -6,12 +6,13 @@
  * found in the LICENSE file.
  */
 #include "SampleCode.h"
+#include "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
+#include "SkCanvas.h"
 #include "SkColorPriv.h"
 #include "SkGradientShader.h"
+#include "SkUtils.h"
 #include "SkView.h"
-#include "SkCanvas.h"
-#include "SkUtils.h"
 
 static SkBitmap make_bitmap() {
     SkBitmap bm;
@@ -97,9 +98,9 @@
             paint.setColor(SK_ColorBLUE);
             for (size_t i = 0; i < SK_ARRAY_COUNT(gRecs); i++) {
                 if (gRecs[i].fStyle != NONE) {
-                    SkMaskFilter* mf = SkBlurMaskFilter::Create(20,
-                                                                gRecs[i].fStyle,
-                                                                flags);
+                    SkMaskFilter* mf = SkBlurMaskFilter::Create(gRecs[i].fStyle,
+                                      SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(20)),
+                                      flags);
                     paint.setMaskFilter(mf)->unref();
                 } else {
                     paint.setMaskFilter(NULL);
@@ -109,9 +110,9 @@
             }
             // draw text
             {
-                SkMaskFilter* mf = SkBlurMaskFilter::Create(4,
-                                                            SkBlurMaskFilter::kNormal_BlurStyle,
-                                                            flags);
+                SkMaskFilter* mf = SkBlurMaskFilter::Create(SkBlurMaskFilter::kNormal_BlurStyle,
+                                      SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(4)),
+                                      flags);
                 paint.setMaskFilter(mf)->unref();
                 SkScalar x = SkIntToScalar(70);
                 SkScalar y = SkIntToScalar(400);