[wasm] No need to use multiple inheritance for `ModuleBytesEnv`

src/wasm/wasm-text.cc

 // 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.
 
 #include "src/wasm/wasm-text.h"
 
 #include "src/debug/interface-types.h"
 #include "src/ostreams.h"
 #include "src/vector.h"
 #include "src/wasm/function-body-decoder.h"
@@ skipping 51 matching lines @@
     os << " (result";
     for (size_t i = 0; i < return_count; ++i)
       os << ' ' << WasmOpcodes::TypeName(fun->sig->GetReturn(i));
     os << ')';
   }
   os << "\n";
   ++line_nr;
 
   // Print the local declarations.
   BodyLocalDecls decls(&zone);
-  Vector<const byte> func_bytes = wire_bytes.module_bytes.SubVector(
-      fun->code_start_offset, fun->code_end_offset);
+  Vector<const byte> func_bytes = wire_bytes.GetFunctionBytes(fun);
   BytecodeIterator i(func_bytes.begin(), func_bytes.end(), &decls);
   DCHECK_LT(func_bytes.begin(), i.pc());
   if (!decls.type_list.empty()) {
     os << "(local";
     for (const ValueType &v : decls.type_list) {
       os << ' ' << WasmOpcodes::TypeName(v);
     }
     os << ")\n";
     ++line_nr;
   }
@@ skipping 118 matching lines @@
       default:
         UNREACHABLE();
         break;
     }
     os << '\n';
     ++line_nr;
   }
   DCHECK_EQ(0, control_depth);
   DCHECK(i.ok());
 }