Mojo: more idiomatic C++ bindings

mojo/public/cpp/bindings/lib/buffer.h

Index: mojo/public/cpp/bindings/lib/buffer.h
diff --git a/mojo/public/cpp/bindings/lib/buffer.h b/mojo/public/cpp/bindings/lib/buffer.h
new file mode 100644
index 0000000000000000000000000000000000000000..c3b570e7767d5aee8a2e3593fa9a2d849d3e4179
--- /dev/null
+++ b/mojo/public/cpp/bindings/lib/buffer.h
@@ -0,0 +1,24 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_BUFFER_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_LIB_BUFFER_H_
+
+#include <stddef.h>
+
+namespace mojo {
+namespace internal {
+
+// Buffer provides a way to allocate memory. Allocations are 8-byte aligned and
+// zero-initialized. Allocations remain valid for the lifetime of the Buffer.
+class Buffer {
+ public:
+  virtual ~Buffer() {}
+  virtual void* Allocate(size_t num_bytes) = 0;
+};
+
+}  // namespace internal
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_BUFFER_H_