[Interpreter] Support for operator new.

src/interpreter/bytecode-array-builder.h

Index: src/interpreter/bytecode-array-builder.h
diff --git a/src/interpreter/bytecode-array-builder.h b/src/interpreter/bytecode-array-builder.h
index 5f90f9ec7feebc921752e68eabdaa4c8c4ec1ed7..ba28c76b255068e4274e386f8b8dfec1fc02446a 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -100,13 +100,19 @@ class BytecodeArrayBuilder {
   BytecodeArrayBuilder& Call(Register callable, Register receiver,
                              size_t arg_count);
 
+  // Call the new operator. The |constructor| register is followed by
+  // |arg_count| consecutive registers containing arguments to be
+  // applied to the constructor.
+  BytecodeArrayBuilder& New(Register constructor, Register first_arg,
+                            size_t arg_count);
+
   // Call the runtime function with |function_id|. The first argument should be
   // in |first_arg| and all subsequent arguments should be in registers
   // <first_arg + 1> to <first_arg + 1 + arg_count>.
   BytecodeArrayBuilder& CallRuntime(Runtime::FunctionId function_id,
                                     Register first_arg, size_t arg_count);
 
-  // Operators (register == lhs, accumulator = rhs).
+  // Operators (register holds the lhs value, accumulator holds the rhs value).
   BytecodeArrayBuilder& BinaryOperation(Token::Value binop, Register reg,
                                         Strength strength);