[wasm] Provide better stack traces for asm.js code

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 0339a9668b0d2bf73c899cfbd13fc95673783fab..1013d87119408b8cbdd835dbc06f2f1d64a09a19 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2973,14 +2973,16 @@ class FrameArray : public FixedArray {
 #undef DECLARE_FRAME_ARRAY_ACCESSORS
 
   inline bool IsWasmFrame(int frame_ix) const;
+  inline bool IsAsmJsWasmFrame(int frame_ix) const;
   inline int FrameCount() const;
 
   void ShrinkToFit();
 
   // Flags.
   static const int kIsWasmFrame = 1 << 0;
-  static const int kIsStrict = 1 << 1;
-  static const int kForceConstructor = 1 << 2;
+  static const int kIsAsmJsWasmFrame = 1 << 1;
+  static const int kIsStrict = 1 << 2;
+  static const int kForceConstructor = 1 << 3;
 
   static Handle<FrameArray> AppendJSFrame(Handle<FrameArray> in,
                                           Handle<Object> receiver,