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

samplecode/SampleEffects.cpp

Index: samplecode/SampleEffects.cpp
===================================================================
--- samplecode/SampleEffects.cpp	(revision 11004)
+++ samplecode/SampleEffects.cpp	(working copy)
@@ -22,14 +22,18 @@
 }
 
 static void paint_proc1(SkPaint* paint) {
-    paint->setMaskFilter(SkBlurMaskFilter::Create(2,
-                                SkBlurMaskFilter::kNormal_BlurStyle))->unref();
+    paint->setMaskFilter(SkBlurMaskFilter::Create(
+                                SkBlurMaskFilter::kNormal_BlurStyle,
+                                SkFloatToScalar(1.6547f)))->unref();
 }
 
 static void paint_proc2(SkPaint* paint) {
     SkScalar dir[3] = { 1, 1, 1};
     paint->setMaskFilter(
-                     SkBlurMaskFilter::CreateEmboss(dir, 0.1f, 0.05f, 1))->unref();
+                     SkBlurMaskFilter::CreateEmboss(SkFloatToScalar(1.07735f), 
+                                                    dir, 
+                                                    SkFloatToScalar(0.1f), 
+                                                    SkFloatToScalar(0.05f)))->unref();
 }
 
 static void paint_proc3(SkPaint* paint) {