enforce 16byte alignment in shader contexts

src/core/SkBlitter.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 "SkBlitter.h"
 #include "SkAntiRun.h"
 #include "SkColor.h"
@@ skipping 574 matching lines @@
 class Sk3DShader : public SkShader {
 public:
     Sk3DShader(SkShader* proxy) : fProxy(proxy) {
         SkSafeRef(proxy);
     }
 
     virtual ~Sk3DShader() {
         SkSafeUnref(fProxy);
     }
 
-    size_t contextSize(const ContextRec& rec) const override {
+    size_t onContextSize(const ContextRec& rec) const override {
         size_t size = sizeof(Sk3DShaderContext);
         if (fProxy) {
             size += fProxy->contextSize(rec);
         }
         return size;
     }
 
     Context* onCreateContext(const ContextRec& rec, void* storage) const override {
         SkShader::Context* proxyContext = nullptr;
         if (fProxy) {
@@ skipping 403 matching lines @@
     fShaderContext->~Context();
     SkShader::Context* ctx = fShader->createContext(rec, (void*)fShaderContext);
     if (nullptr == ctx) {
         // Need a valid context in fShaderContext's storage, so we can later (or our caller) call
         // the in-place destructor.
         new (fShaderContext) SkZeroShaderContext(*fShader, rec);
         return false;
     }
     return true;
 }