Add ContextRec param to SkShader::contextSize()

include/core/SkShader.h

Index: include/core/SkShader.h
diff --git a/include/core/SkShader.h b/include/core/SkShader.h
index 36256f6f09e4e73cc9d7e22d31982e6b1aecfc07..8e69fafa78a34500a0b70f4d4f981391f152c0cc 100644
--- a/include/core/SkShader.h
+++ b/include/core/SkShader.h
@@ -188,7 +188,7 @@ public:
      *  Override this if your subclass overrides createContext, to return the correct size of
      *  your subclass' context.
      */
-    virtual size_t contextSize() const;
+    virtual size_t contextSize(const ContextRec&) const;
 
     /**
      *  Returns true if this shader is just a bitmap, and if not null, returns the bitmap,