make compute helper for blurs private

Precursor for moving blurmaskfilter into core, since it is referenced
by core code for drawShadow.

Bug: skia:
Change-Id: I900c6e10523115c75f45d2c410eb6a5ca56a6e4d
Reviewed-on: https://skia-review.googlesource.com/112301
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/tests/BlurTest.cpp b/tests/BlurTest.cpp
index 29c44d7..b84fb4c 100644
--- a/tests/BlurTest.cpp
+++ b/tests/BlurTest.cpp
@@ -8,6 +8,7 @@
 #include "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
 #include "SkBlurDrawLooper.h"
+#include "SkBlurPriv.h"
 #include "SkCanvas.h"
 #include "SkColorFilter.h"
 #include "SkColorPriv.h"
@@ -522,8 +523,10 @@
     bool ninePatchable;
     SkRRect rrectToDraw;
     SkISize size;
-    SkScalar rectXs[SkBlurMaskFilter::kMaxDivisions], rectYs[SkBlurMaskFilter::kMaxDivisions];
-    SkScalar texXs[SkBlurMaskFilter::kMaxDivisions], texYs[SkBlurMaskFilter::kMaxDivisions];
+    SkScalar rectXs[kSkBlurRRectMaxDivisions],
+             rectYs[kSkBlurRRectMaxDivisions];
+    SkScalar texXs[kSkBlurRRectMaxDivisions],
+             texYs[kSkBlurRRectMaxDivisions];
     int numX, numY;
     uint32_t skipMask;
 
@@ -534,11 +537,11 @@
         SkRRect rr;
         rr.setRectRadii(r, radii);
 
-        ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(rr, rr, SkRect::MakeEmpty(),
-                                                                    kBlurRad, kBlurRad,
-                                                                    &rrectToDraw, &size,
-                                                                    rectXs, rectYs, texXs, texYs,
-                                                                    &numX, &numY, &skipMask);
+        ninePatchable = SkComputeBlurredRRectParams(rr, rr, SkRect::MakeEmpty(),
+                                                    kBlurRad, kBlurRad,
+                                                    &rrectToDraw, &size,
+                                                    rectXs, rectYs, texXs, texYs,
+                                                    &numX, &numY, &skipMask);
         REPORTER_ASSERT(reporter, !ninePatchable);
     }
 
@@ -548,11 +551,11 @@
         SkRRect rr;
         rr.setRectXY(r, kCornerRad, kCornerRad);
 
-        ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(rr, rr, SkRect::MakeEmpty(),
-                                                                    kBlurRad, kBlurRad,
-                                                                    &rrectToDraw, &size,
-                                                                    rectXs, rectYs, texXs, texYs,
-                                                                    &numX, &numY, &skipMask);
+        ninePatchable = SkComputeBlurredRRectParams(rr, rr, SkRect::MakeEmpty(),
+                                                    kBlurRad, kBlurRad,
+                                                    &rrectToDraw, &size,
+                                                    rectXs, rectYs, texXs, texYs,
+                                                    &numX, &numY, &skipMask);
 
         static const SkScalar kAns = 12.0f * kBlurRad + 2.0f * kCornerRad + 1.0f;
         REPORTER_ASSERT(reporter, ninePatchable);
@@ -569,11 +572,11 @@
         SkRRect rr;
         rr.setRectXY(r, kXCornerRad, kYCornerRad);
 
-        ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(rr, rr, SkRect::MakeEmpty(),
-                                                                    kBlurRad, kBlurRad,
-                                                                    &rrectToDraw, &size,
-                                                                    rectXs, rectYs, texXs, texYs,
-                                                                    &numX, &numY, &skipMask);
+        ninePatchable = SkComputeBlurredRRectParams(rr, rr, SkRect::MakeEmpty(),
+                                                    kBlurRad, kBlurRad,
+                                                    &rrectToDraw, &size,
+                                                    rectXs, rectYs, texXs, texYs,
+                                                    &numX, &numY, &skipMask);
 
         static const SkScalar kXAns = 12.0f * kBlurRad + 2.0f * kXCornerRad + 1.0f;
         static const SkScalar kYAns = 12.0f * kBlurRad + 2.0f * kYCornerRad + 1.0f;
@@ -614,8 +617,7 @@
                             continue;
                         }
 
-                        ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(
-                                                                    rr, rr, occluder,
+                        ninePatchable = SkComputeBlurredRRectParams(rr, rr, occluder,
                                                                     kBlurRad, kBlurRad,
                                                                     &rrectToDraw, &size,
                                                                     rectXs, rectYs, texXs, texYs,