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

src/messages.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The infrastructure used for (localized) message reporting in V8.
 //
 // Note: there's a big unresolved issue about ownership of the data
 // structures used by this framework.
 
 #ifndef V8_MESSAGES_H_
@@ skipping 145 matching lines @@
   // TODO(wasm): Use proper typing.
   Handle<Object> wasm_instance_;
   uint32_t wasm_func_index_;
   Handle<AbstractCode> code_;
   int offset_;
 
  private:
   void FromFrameArray(Isolate* isolate, Handle<FrameArray> array, int frame_ix);
 
   friend class FrameArrayIterator;
+  friend class AsmJsWasmStackFrame;
 };
 
 class AsmJsWasmStackFrame : public WasmStackFrame {
  public:
   virtual ~AsmJsWasmStackFrame() {}
 
   Handle<Object> GetReceiver() const override;
   Handle<Object> GetFunction() const override;
 
   Handle<Object> GetFileName() override;
   Handle<Object> GetScriptNameOrSourceUrl() override;
 
   int GetPosition() const override;
   int GetLineNumber() override;
   int GetColumnNumber() override;
 
   MaybeHandle<String> ToString() override;
+
+ private:
+  friend class FrameArrayIterator;
+  void FromFrameArray(Isolate* isolate, Handle<FrameArray> array, int frame_ix);
+
+  bool is_at_number_conversion_;
 };
 
 class FrameArrayIterator {
  public:
   FrameArrayIterator(Isolate* isolate, Handle<FrameArray> array,
                      int frame_ix = 0);
 
   StackFrameBase* Frame();
 
   bool HasNext() const;
@@ skipping 515 matching lines @@
   static Handle<String> GetMessage(Isolate* isolate, Handle<Object> data);
   static std::unique_ptr<char[]> GetLocalizedMessage(Isolate* isolate,
                                                      Handle<Object> data);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MESSAGES_H_