Change SkMatrix::fixedStepInX to return SkVector rather than SkFixed.

src/effects/gradients/SkTwoPointConicalGradient.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTwoPointConicalGradient.h"
 #include "SkTwoPointConicalGradient_gpu.h"
 
@@ skipping 243 matching lines @@
     }
 
     if (fDstToIndexClass != kPerspective_MatrixClass) {
         SkPoint srcPt;
         dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf,
                 SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
         SkScalar dx, fx = srcPt.fX;
         SkScalar dy, fy = srcPt.fY;
 
         if (fDstToIndexClass == kFixedStepInX_MatrixClass) {
-            SkFixed fixedX, fixedY;
-            (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), &fixedX, &fixedY);
-            dx = SkFixedToScalar(fixedX);
-            dy = SkFixedToScalar(fixedY);
+            const auto step = fDstToIndex.fixedStepInX(SkIntToScalar(y));
+            dx = step.fX;
+            dy = step.fY;
         } else {
             SkASSERT(fDstToIndexClass == kLinear_MatrixClass);
             dx = fDstToIndex.getScaleX();
             dy = fDstToIndex.getSkewY();
         }
 
         TwoPtRadialContext rec(twoPointConicalGradient.fRec, fx, fy, dx, dy);
         (*shadeProc)(&rec, dstC, cache, toggle, count);
     } else {    // perspective case
         SkScalar dstX = SkIntToScalar(x) + SK_ScalarHalf;
@@ skipping 111 matching lines @@
     str->appendScalar(fCenter2.fY);
     str->append(") radius2: ");
     str->appendScalar(fRadius2);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif