Add special case circle blur for Ganesh

include/core/SkScalar.h

 /*
  * 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.
  */
 
 #ifndef SkScalar_DEFINED
 #define SkScalar_DEFINED
 
@@ skipping 206 matching lines @@
 
 #define SK_ScalarNearlyZero         (SK_Scalar1 / (1 << 12))
 
 static inline bool SkScalarNearlyZero(SkScalar x,
                                     SkScalar tolerance = SK_ScalarNearlyZero) {
     SkASSERT(tolerance >= 0);
     return SkScalarAbs(x) <= tolerance;
 }
 
 static inline bool SkScalarNearlyEqual(SkScalar x, SkScalar y,
-                                     SkScalar tolerance = SK_ScalarNearlyZero) {
+                                       SkScalar tolerance = SK_ScalarNearlyZero) {
     SkASSERT(tolerance >= 0);
     return SkScalarAbs(x-y) <= tolerance;
 }
 
 /** Linearly interpolate between A and B, based on t.
     If t is 0, return A
     If t is 1, return B
     else interpolate.
     t must be [0..SK_Scalar1]
 */
@@ skipping 22 matching lines @@
     SkASSERT(n >= 0);
     for (int i = 0; i < n; ++i) {
         if (a[i] != b[i]) {
             return false;
         }
     }
     return true;
 }
 
 #endif