[Interpreter] Add support for loading globals in the interpreter.

src/interpreter/bytecode-array-iterator.h

Index: src/interpreter/bytecode-array-iterator.h
diff --git a/src/interpreter/bytecode-array-iterator.h b/src/interpreter/bytecode-array-iterator.h
index a0de3f0e7737e24436cf69aae83548c086ff2beb..25d99e1cc9b8ffa6e4e2176871d6ffa3092d9aa0 100644
--- a/src/interpreter/bytecode-array-iterator.h
+++ b/src/interpreter/bytecode-array-iterator.h
@@ -29,9 +29,11 @@ class BytecodeArrayIterator {
   Register GetRegisterOperand(int operand_index) const;
   Handle<Object> GetConstantForIndexOperand(int operand_index) const;
 
- private:
-  uint8_t GetOperand(int operand_index, OperandType operand_type) const;
+  // Get the raw byte for the given operand. Note: you should prefer using the
+  // typed versions above which cast the return to an appropriate type.
+  uint8_t GetRawOperand(int operand_index, OperandType operand_type) const;
 
+ private:
   Handle<BytecodeArray> bytecode_array_;
   int bytecode_offset_;