Introduce kRegisterSize, kPCOnStackSize and kFPOnStackSize constants

src/frames.h

Index: src/frames.h
===================================================================
--- src/frames.h	(revision 15739)
+++ src/frames.h	(working copy)
@@ -92,7 +92,7 @@
   static const int kContextOffset  = 3 * kPointerSize;
   static const int kFPOffset       = 4 * kPointerSize;
 
-  static const int kSize = kFPOffset + kPointerSize;
+  static const int kSize = kFPOffset + kFPOnStackSize;
   static const int kSlotCount = kSize >> kPointerSizeLog2;
 };
 
@@ -168,13 +168,14 @@
   // context and function.
   // StandardFrame::IterateExpressions assumes that kContextOffset is the last
   // object pointer.
-  static const int kFixedFrameSize    =  4 * kPointerSize;
+  static const int kFixedFrameSize    =  kPCOnStackSize + kFPOnStackSize +
+                                         2 * kPointerSize;
   static const int kExpressionsOffset = -3 * kPointerSize;
   static const int kMarkerOffset      = -2 * kPointerSize;
   static const int kContextOffset     = -1 * kPointerSize;
   static const int kCallerFPOffset    =  0 * kPointerSize;
-  static const int kCallerPCOffset    = +1 * kPointerSize;
-  static const int kCallerSPOffset    = +2 * kPointerSize;
+  static const int kCallerPCOffset    = +1 * kFPOnStackSize;
+  static const int kCallerSPOffset    = +2 * kPCOnStackSize;
 };