[interpreter] Add basic framework for bytecode handler code generation.

src/interpreter/interpreter.h

Index: src/interpreter/interpreter.h
diff --git a/src/interpreter/interpreter.h b/src/interpreter/interpreter.h
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+++ b/src/interpreter/interpreter.h
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+// 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_INTERPRETER_H_
+#define V8_INTERPRETER_INTERPRETER_H_
+
+// Clients of this interface shouldn't depend on lots of interpreter internals.
+// Do not include anything from src/interpreter other than
+// src/interpreter/bytecodes.h here!
+#include "src/base/macros.h"
+#include "src/interpreter/bytecodes.h"
+
+namespace v8 {
+namespace internal {
+
+class Isolate;
+class CompilationInfo;
+
+namespace compiler {
+class InterpreterAssembler;
+}
+
+namespace interpreter {
+
+class Interpreter {
+ public:
+  explicit Interpreter(Isolate* isolate);
+  virtual ~Interpreter() {}
+
+  void Initialize(bool create_heap_objects);
+
+ private:
+// Bytecode handler generator functions.
+#define DECLARE_BYTECODE_HANDLER_GENERATOR(Name, _) \
+  void Do##Name(compiler::InterpreterAssembler* assembler);
+  BYTECODE_LIST(DECLARE_BYTECODE_HANDLER_GENERATOR)
+#undef DECLARE_BYTECODE_HANDLER_GENERATOR
+
+  Isolate* isolate_;  // Not owned.
+
+  DISALLOW_COPY_AND_ASSIGN(Interpreter);
+};
+
+}  // namespace interpreter
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_INTERPRETER_INTERPRETER_H_