[wasm] GrowMemory should update imported memory objects.

src/wasm/wasm-js.h

 // Copyright 2015 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_JS_H_
 #define V8_WASM_JS_H_
 
 #include "src/allocation.h"
 #include "src/base/hashmap.h"
 
@@ skipping 15 matching lines @@
 
   static Handle<JSObject> CreateWasmMemoryObject(Isolate* isolate,
                                                  Handle<JSArrayBuffer> buffer,
                                                  bool has_maximum, int maximum);
 
   static bool IsWasmMemoryObject(Isolate* isolate, Handle<Object> value);
 
   static Handle<JSArrayBuffer> GetWasmMemoryArrayBuffer(Isolate* isolate,
                                                         Handle<Object> value);
 
+  static void SetWasmMemoryArrayBuffer(Isolate* isolate, Handle<Object> value,
+                                       Handle<JSArrayBuffer> buffer);
+
   static uint32_t GetWasmMemoryMaximumSize(Isolate* isolate,
                                            Handle<Object> value);
 
   static void SetWasmMemoryInstance(Isolate* isolate, Handle<Object> value,
                                     Handle<JSObject> instance);
 };
 
 }  // namespace internal
 }  // namespace v8
 #endif