enforce 16byte alignment in shader contexts

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 193 matching lines @@
     fRec.init(fCenter1, fRadius1, fCenter2, fRadius2, fFlippedGrad);
 }
 
 bool SkTwoPointConicalGradient::isOpaque() const {
     // Because areas outside the cone are left untouched, we cannot treat the
     // shader as opaque even if the gradient itself is opaque.
     // TODO(junov): Compute whether the cone fills the plane crbug.com/222380
     return false;
 }
 
-size_t SkTwoPointConicalGradient::contextSize(const ContextRec&) const {
-    return sizeof(TwoPointConicalGradientContext);
+size_t SkTwoPointConicalGradient::onContextSize(const ContextRec&) const {
+    return SkAlign16(sizeof(TwoPointConicalGradientContext));
 }
 
 SkShader::Context* SkTwoPointConicalGradient::onCreateContext(const ContextRec& rec,
                                                               void* storage) const {
     return new (storage) TwoPointConicalGradientContext(*this, rec);
 }
 
 SkTwoPointConicalGradient::TwoPointConicalGradientContext::TwoPointConicalGradientContext(
         const SkTwoPointConicalGradient& shader, const ContextRec& rec)
     : INHERITED(shader, rec)
@@ skipping 162 matching lines @@
     str->appendScalar(fCenter2.fY);
     str->append(") radius2: ");
     str->appendScalar(fRadius2);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif