Remove SkCanvas matrix ops return value.

src/effects/gradients/SkGradientShader.cpp

 /*
  * 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.
  */
 
 #include "SkGradientShaderPriv.h"
 #include "SkLinearGradient.h"
 #include "SkRadialGradient.h"
@@ skipping 215 matching lines @@
 
 bool SkGradientShaderBase::setContext(const SkBitmap& device,
                                  const SkPaint& paint,
                                  const SkMatrix& matrix) {
     if (!this->INHERITED::setContext(device, paint, matrix)) {
         return false;
     }
 
     const SkMatrix& inverse = this->getTotalInverse();
 
-    if (!fDstToIndex.setConcat(fPtsToUnit, inverse)) {
-        // need to keep our set/end context calls balanced.
-        this->INHERITED::endContext();
-        return false;
-    }
-
+    fDstToIndex.setConcat(fPtsToUnit, inverse);
     fDstToIndexProc = fDstToIndex.getMapXYProc();
     fDstToIndexClass = (uint8_t)SkShader::ComputeMatrixClass(fDstToIndex);
 
     // now convert our colors in to PMColors
     unsigned paintAlpha = this->getPaintAlpha();
 
     fFlags = this->INHERITED::getFlags();
     if (fColorsAreOpaque && paintAlpha == 0xFF) {
         fFlags |= kOpaqueAlpha_Flag;
     }
@@ skipping 886 matching lines @@
             (*stops)[i] = stop;
             stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - stop) : 1.f;
         }
     }
     *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileModeCount));
 
     return outColors;
 }
 
 #endif