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

src/interpreter/bytecode-array-iterator.h

 // Copyright 2015 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.
 
 #ifndef V8_INTERPRETER_BYTECODE_ARRAY_ITERATOR_H_
 #define V8_INTERPRETER_BYTECODE_ARRAY_ITERATOR_H_
 
 #include "src/handles.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/objects.h"
@@ skipping 11 matching lines @@
   Bytecode current_bytecode() const;
   const Handle<BytecodeArray>& bytecode_array() const {
     return bytecode_array_;
   }
 
   int8_t GetSmi8Operand(int operand_index) const;
   int GetIndexOperand(int operand_index) const;
   Register GetRegisterOperand(int operand_index) const;
   Handle<Object> GetConstantForIndexOperand(int operand_index) 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:
-  uint8_t GetOperand(int operand_index, OperandType operand_type) const;
-
   Handle<BytecodeArray> bytecode_array_;
   int bytecode_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(BytecodeArrayIterator);
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_GRAPH_ITERATOR_H_