Expose an API on ArrayBufferView to copy out content w/o changing the buffer

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 3464 matching lines @@
   Local<ArrayBuffer> Buffer();
   /**
    * Byte offset in |Buffer|.
    */
   size_t ByteOffset();
   /**
    * Size of a view in bytes.
    */
   size_t ByteLength();
 
+  /**
+   * Copy the contents of the ArrayBufferView's buffer to an embedder defined
+   * memory without additional overhead that calling ArrayBufferView::Buffer
+   * might incur.
+   *
+   * Will write at most min(|byte_length|, ByteLength) bytes starting at
+   * ByteOffset of the underling buffer to the memory starting at |dest|.
+   * Returns the number of bytes actually written.
+   */
+  size_t CopyContents(void* dest, size_t byte_length);
+
   V8_INLINE static ArrayBufferView* Cast(Value* obj);
 
   static const int kInternalFieldCount =
       V8_ARRAY_BUFFER_VIEW_INTERNAL_FIELD_COUNT;
 
  private:
   ArrayBufferView();
   static void CheckCast(Value* obj);
 };
 
@@ skipping 4564 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_