Add PPB_Memory_Dev. This is the first of a few CLs needed to pull MemAlloc and

ppapi/cpp/dev/memory_dev.h

Index: ppapi/cpp/dev/memory_dev.h
diff --git a/ppapi/cpp/dev/memory_dev.h b/ppapi/cpp/dev/memory_dev.h
new file mode 100644
index 0000000000000000000000000000000000000000..2695cae0e641d41c6581294a5c491954e5ddfebd
--- /dev/null
+++ b/ppapi/cpp/dev/memory_dev.h
@@ -0,0 +1,36 @@
+// Copyright (c) 2011 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 PPAPI_CPP_DEV_MEMORY_DEV_H_
+#define PPAPI_CPP_DEV_MEMORY_DEV_H_
+
+#include "ppapi/c/pp_stdint.h"
+
+/// @file
+/// This file defines APIs related to memory management.
+
+namespace pp {
+
+/// APIs related to memory management, time, and threads.
+class Memory_Dev {
+ public:
+  Memory_Dev() {}
+
+  /// A function that allocates memory.
+  ///
+  /// @param[in] num_bytes A number of bytes to allocate.
+  /// @return A pointer to the memory if successful, NULL If the
+  /// allocation fails.
+  void* MemAlloc(uint32_t num_bytes);
+
+  /// A function that deallocates memory.
+  ///
+  /// @param[in] ptr A pointer to the memory to deallocate. It is safe to
+  /// pass NULL to this function.
+  void MemFree(void* ptr);
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_DEV_MEMORY_DEV_H_