Begin implementing V8 bindings for Mojo

mojo/public/bindings/js/v8_array_buffer.h

Index: mojo/public/bindings/js/v8_array_buffer.h
diff --git a/mojo/public/bindings/js/v8_array_buffer.h b/mojo/public/bindings/js/v8_array_buffer.h
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+// 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_BINDINGS_JS_V8_ARRAY_BUFFER_H_
+#define MOJO_PUBLIC_BINDINGS_JS_V8_ARRAY_BUFFER_H_
+
+#include "mojo/public/system/macros.h"
+#include "v8/include/v8.h"
+
+namespace mojo {
+namespace js {
+
+class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
+ public:
+  virtual void* Allocate(size_t length) MOJO_OVERRIDE;
+  virtual void* AllocateUninitialized(size_t length) MOJO_OVERRIDE;
+  virtual void Free(void* data, size_t length) MOJO_OVERRIDE;
+
+  static ArrayBufferAllocator* SharedInstance();
+};
+
+class BufferView {
+ public:
+  BufferView(v8::Isolate* isolate, v8::Handle<v8::ArrayBufferView> view);
+  BufferView(v8::Isolate* isolate, v8::Handle<v8::ArrayBuffer> buffer);
+  ~BufferView();
+
+  void* bytes() const { return bytes_; }
+  size_t num_bytes() const { return num_bytes_; }
+
+ private:
+  class Private;
+
+  void Initialize(v8::Isolate* isolate, v8::Handle<v8::ArrayBuffer> buffer);
+
+  Private* private_;
+  void* bytes_;
+  size_t num_bytes_;
+
+  MOJO_DISALLOW_COPY_AND_ASSIGN(BufferView);
+};
+
+}  // namespace js
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_BINDINGS_JS_V8_ARRAY_BUFFER_H_