[wasm] Remove two obsolete functions

src/wasm/wasm-objects.h

 // Copyright 2016 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.
 
 #ifndef V8_WASM_OBJECTS_H_
 #define V8_WASM_OBJECTS_H_
 
 #include "src/objects-inl.h"
 #include "src/wasm/managed.h"
 
@@ skipping 257 matching lines @@
  private:
   void InitId();
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WasmCompiledModule);
 };
 
 class WasmDebugInfo : public FixedArray {
  public:
   enum class Fields { kFieldCount };
 
-  static Handle<WasmDebugInfo> New(Handle<JSObject> wasm);
+  static Handle<WasmDebugInfo> New(Handle<WasmInstanceObject> instance);
 
   static bool IsDebugInfo(Object* object);
   static WasmDebugInfo* cast(Object* object);
 
-  JSObject* wasm_instance();
+  WasmInstanceObject* wasm_instance();
 
   bool SetBreakPoint(int byte_offset);
 
   // Get the Script for the specified function.
   static Script* GetFunctionScript(Handle<WasmDebugInfo> debug_info,
                                    int func_index);
 
   // Disassemble the specified function from this module.
   static Handle<String> DisassembleFunction(Handle<WasmDebugInfo> debug_info,
                                             int func_index);
@@ skipping 11 matching lines @@
                                     int func_index, int byte_offset);
 };
 
 #undef DECLARE_ACCESSORS
 #undef DECLARE_OPTIONAL_ACCESSORS
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_OBJECTS_H_