Enforce 16byte alignment in shader contexts (patchset #1 id:1 of https://codereview.chromium.org/17…

src/core/SkBlitter.cpp

Index: src/core/SkBlitter.cpp
diff --git a/src/core/SkBlitter.cpp b/src/core/SkBlitter.cpp
index c7c903dc6bcff4e2a305c13911abb7bda8a1bc58..ce7c4e8ccd70b966825c04fa09e66f0beea347e2 100644
--- a/src/core/SkBlitter.cpp
+++ b/src/core/SkBlitter.cpp
@@ -592,8 +592,8 @@ public:
         SkSafeUnref(fProxy);
     }
 
-    size_t contextSize(const ContextRec& rec) const override {
-        size_t size = sizeof(Sk3DShaderContext);
+    size_t onContextSize(const ContextRec& rec) const override {
+        size_t size = SkAlign16(sizeof(Sk3DShaderContext));
         if (fProxy) {
             size += fProxy->contextSize(rec);
         }