[wasm] Fix location for error in asm.js ToNumber conversion

src/frames.h

Index: src/frames.h
diff --git a/src/frames.h b/src/frames.h
index cce636e2c295defae8076e47796d1bac8b765bc0..ddb2f5a937701c426842bfeb9d06fb09ca0d6f8a 100644
--- a/src/frames.h
+++ b/src/frames.h
@@ -562,6 +562,8 @@ class StackFrame BASE_EMBEDDED {
   void operator=(const StackFrame& original) = delete;
 
  protected:
+  const StackFrameIteratorBase* iterator_;
+
   inline explicit StackFrame(StackFrameIteratorBase* iterator);
   virtual ~StackFrame() { }
 
@@ -581,7 +583,6 @@ class StackFrame BASE_EMBEDDED {
 #endif
 
  private:
-  const StackFrameIteratorBase* iterator_;
   Isolate* isolate_;
   State state_;
 
@@ -1106,6 +1107,7 @@ class WasmFrame : public StandardFrame {
   uint32_t function_index() const;
   Script* script() const override;
   int position() const override;
+  bool at_to_number_conversion() const;
 
   static WasmFrame* cast(StackFrame* frame) {
     DCHECK(frame->is_wasm());
@@ -1129,6 +1131,8 @@ class WasmToJsFrame : public StubFrame {
   inline explicit WasmToJsFrame(StackFrameIteratorBase* iterator);
 
  private:
+  void ComputeCallerState(State* state) const override;
+
   friend class StackFrameIteratorBase;
 };