X87: [runtime] Unify and simplify how frames are marked.

src/x87/frames-x87.h

Index: src/x87/frames-x87.h
diff --git a/src/x87/frames-x87.h b/src/x87/frames-x87.h
index 275713705becafef048982f41015cb1d93d770e9..1a378ed3ecc1f1643a8829f8d52ce564fada78ea 100644
--- a/src/x87/frames-x87.h
+++ b/src/x87/frames-x87.h
@@ -42,13 +42,11 @@ class EntryFrameConstants : public AllStatic {
   static const int kArgvOffset          = +6 * kPointerSize;
 };
 
-
-class ExitFrameConstants : public AllStatic {
+class ExitFrameConstants : public TypedFrameConstants {
  public:
-  static const int kFrameSize      = 2 * kPointerSize;
-
-  static const int kCodeOffset     = -2 * kPointerSize;
-  static const int kSPOffset       = -1 * kPointerSize;
+  static const int kSPOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0);
+  static const int kCodeOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(1);
+  DEFINE_TYPED_FRAME_SIZES(2);
 
   static const int kCallerFPOffset =  0 * kPointerSize;
   static const int kCallerPCOffset = +1 * kPointerSize;
@@ -66,7 +64,7 @@ class JavaScriptFrameConstants : public AllStatic {
   // FP-relative.
   static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
   static const int kLastParameterOffset = +2 * kPointerSize;
-  static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
+  static const int kFunctionOffset = StandardFrameConstants::kFunctionOffset;
 
   // Caller SP-relative.
   static const int kParam0Offset   = -2 * kPointerSize;