Expose ArrayBufferView::HasBuffer

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index d94e9b32b854826ba221abb3948f057fb74a9a26..908c0e19e36c206915cc596bbdc5daa691c32c17 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -3511,6 +3511,15 @@ class V8_EXPORT ArrayBufferView : public Object {
    */
   size_t CopyContents(void* dest, size_t byte_length);
 
+  /**
+   * Returns true if ArrayBufferView::Buffer() is a no-op. If it returns false,

[Dmitry Lomov (no reviews), 2015/04/13 08:46:08]

'no-op' is a bad explanation of what 'Buffer' does. 

Better: "returns 'true' if ArrayBufferView's backing ArrayBuffer has already
been alllocated".

+   * getting the buffer might incur allocating a backing store and materializing
+   * the contents. In that case, CopyContents can be used to access the
+   * underlying contents of this ArrayBufferView without materializing the
+   * buffer first.
+   */
+  bool HasBuffer() const;
+
   V8_INLINE static ArrayBufferView* Cast(Value* obj);
 
   static const int kInternalFieldCount =