Remove code.h header and move ParameterCount class.

src/code.h

-// Copyright 2006-2008 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_CODE_H_
-#define V8_CODE_H_
-
-#include "src/allocation.h"
-#include "src/handles.h"
-#include "src/objects.h"
-
-namespace v8 {
-namespace internal {
-
-
-// Wrapper class for passing expected and actual parameter counts as
-// either registers or immediate values. Used to make sure that the
-// caller provides exactly the expected number of parameters to the
-// callee.
-class ParameterCount BASE_EMBEDDED {
- public:
-  explicit ParameterCount(Register reg)
-      : reg_(reg), immediate_(0) { }
-  explicit ParameterCount(int immediate)
-      : reg_(no_reg), immediate_(immediate) { }
-  explicit ParameterCount(Handle<JSFunction> f)
-      : reg_(no_reg),
-        immediate_(f->shared()->internal_formal_parameter_count()) {}
-
-  bool is_reg() const { return !reg_.is(no_reg); }
-  bool is_immediate() const { return !is_reg(); }
-
-  Register reg() const {
-    DCHECK(is_reg());
-    return reg_;
-  }
-  int immediate() const {
-    DCHECK(is_immediate());
-    return immediate_;
-  }
-
- private:
-  const Register reg_;
-  const int immediate_;
-
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ParameterCount);
-};
-
-
-} }  // namespace v8::internal
-
-#endif  // V8_CODE_H_