Adding GeometryData object

src/gpu/GrGeometryData.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrGeometryData_DEFINED
+#define GrGeometryData_DEFINED
+
+#include <new>
+#include "SkTypes.h"
+
+/*
+ * A super lightweight base class for GeometryProcessor's to use to store draw data in a reorderable
+ * fashion.  Its most important feature is a pool allocator.  Its virtual, but only so subclasses
+ * will have their destructors called.
+ */
+
+class GrGeometryData : SkNoncopyable {
+public:
+    virtual ~GrGeometryData() {}
+
+    /**
+      * Helper for down-casting to a GrGeometryData subclass
+      */
+    template <typename T> const T& cast() const { return *static_cast<const T*>(this); }
+
+    void* operator new(size_t size);
+
+    void operator delete(void* target);
+
+    void* operator new(size_t size, void* placement) {
+        return ::operator new(size, placement);
+    }
+
+    void operator delete(void* target, void* placement) {
+        ::operator delete(target, placement);
+    }
+};
+
+#endif