[wasm] Managed<T> ensures T's lifetime does not leak past Isolate's

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/debug/debug.h"
 #include "src/debug/interface-types.h"
 #include "src/objects.h"
 #include "src/trap-handler/trap-handler.h"
-#include "src/wasm/managed.h"
 #include "src/wasm/wasm-limits.h"
 
 namespace v8 {
 namespace internal {
 namespace wasm {
 class InterpretedFrame;
 struct WasmModule;
 }
 
 class WasmCompiledModule;
@@ skipping 469 matching lines @@
   };
 };
 
 #undef DECLARE_ACCESSORS
 #undef DECLARE_OPTIONAL_ACCESSORS
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_OBJECTS_H_