Replace hard-coded stack frame size literals with StandardFrameConstants::kFixedFrameSizeFromFp

src/lithium.cc

Index: src/lithium.cc
diff --git a/src/lithium.cc b/src/lithium.cc
index ee8ea3e711ed95de247ae0ef2afdf921a0a46fe8..414d5f4edeb5bec2a608d727dc2a1c0b503082b4 100644
--- a/src/lithium.cc
+++ b/src/lithium.cc
@@ -237,7 +237,8 @@ int StackSlotOffset(int index) {
   if (index >= 0) {
     // Local or spill slot. Skip the frame pointer, function, and
     // context in the fixed part of the frame.
-    return -(index + 3) * kPointerSize;
+    return -(index + 1) * kPointerSize -
+        StandardFrameConstants::kFixedFrameSizeFromFp;
   } else {
     // Incoming parameter. Skip the return address.
     return -(index + 1) * kPointerSize + kFPOnStackSize + kPCOnStackSize;