Use float rather than SkFixed for gradient TileProcs.

src/effects/gradients/SkClampRange.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkClampRange.h"
 #include "SkMath.h"
 
@@ skipping 47 matching lines @@
     if (fx <= 0) {
         fCount0 = 1;
     } else if (fx < kFracMax_SkGradFixed) {
         fCount1 = 1;
         fFx1 = fx;
     } else {
         fCount2 = 1;
     }
 }
 
-void SkClampRange::init(SkGradFixed fx0, SkGradFixed dx0, int count, int v0, int v1) {
+void SkClampRange::init(float float_fx0, float float_dx0, int count, int v0, int v1) {
     SkASSERT(count > 0);
 
+    SkGradFixed fx0 = SkFloatToGradFixed(float_fx0);
+    SkGradFixed dx0 = SkFloatToGradFixed(float_dx0);
+
     fV0 = v0;
     fV1 = v1;
 
     // special case 1 == count, as it is slightly common for skia
     // and avoids us ever calling divide or 64bit multiply
     if (1 == count) {
         this->initFor1(fx0);
         return;
     }
 
@@ skipping 68 matching lines @@
     if (doSwap) {
         SkTSwap(fCount0, fCount2);
         SkTSwap(fV0, fV1);
         dx = -dx;
     }
 
     if (fCount1 > 0) {
         fFx1 = fx0 + fCount0 * dx;
     }
 }