[wasm] GrowMemory should update imported memory objects.

src/wasm/wasm-js.h

Index: src/wasm/wasm-js.h
diff --git a/src/wasm/wasm-js.h b/src/wasm/wasm-js.h
index 51c7c6b82170e4824d7bda8ea0075ce94b75975c..3c56e1415a5c6b955dab8f30bb3cdf79624e7a53 100644
--- a/src/wasm/wasm-js.h
+++ b/src/wasm/wasm-js.h
@@ -33,6 +33,9 @@ class WasmJs {
   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);