Draft of a PPAPI interface for ArrayBuffer and typed arrays.

ppapi/cpp/var.h

Index: ppapi/cpp/var.h
diff --git a/ppapi/cpp/var.h b/ppapi/cpp/var.h
index 01b4072b2871c124bcb7179515e1cd43aa24783b..34730e364d255c869dbee7905c111909c0d2fb2b 100644
--- a/ppapi/cpp/var.h
+++ b/ppapi/cpp/var.h
@@ -160,6 +160,9 @@ class Var {
            var_.type == PP_VARTYPE_DOUBLE;
   }
 
+  /// This function determines if this <code>Var</code> is an ArrayBuffer.
+  bool is_array_buffer() const { return var_.type == PP_VARTYPE_ARRAY_BUFFER; }
+
   /// AsBool() converts this <code>Var</code> to a bool. Assumes the
   /// internal representation is_bool(). If it's not, it will assert in debug
   /// mode, and return false.