[turbofan] Unify referencing of stack slots

src/compiler/frame.cc

Index: src/compiler/frame.cc
diff --git a/src/compiler/frame.cc b/src/compiler/frame.cc
new file mode 100644
index 0000000000000000000000000000000000000000..079fccb71cf22d40d85cfe3b736f4081a986adb1
--- /dev/null
+++ b/src/compiler/frame.cc
@@ -0,0 +1,24 @@
+// 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.
+
+#include "src/compiler/frame.h"
+
+#include "src/compiler/linkage.h"
+#include "src/compiler/register-allocator.h"
+#include "src/macro-assembler.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+Frame::Frame(int fixed_frame_size_in_slots)
+    : frame_slot_count_(fixed_frame_size_in_slots),
+      spilled_callee_register_slot_count_(0),
+      stack_slot_count_(0),
+      allocated_registers_(NULL),
+      allocated_double_registers_(NULL) {}
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8