[wasm] GrowMemory should update imported memory objects.

src/wasm/wasm-module.cc

 // 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.
 
 #include <memory>
 
 #include "src/base/atomic-utils.h"
 #include "src/code-stubs.h"
 
 #include "src/macro-assembler.h"
@@ skipping 1888 matching lines @@
   Handle<JSArrayBuffer> buffer = NewArrayBuffer(isolate, new_size);
   if (buffer.is_null()) return -1;
   Address new_mem_start = static_cast<Address>(buffer->backing_store());
   if (old_size != 0) {
     memcpy(new_mem_start, old_mem_start, old_size);
   }
   SetInstanceMemory(instance, *buffer);
   Handle<FixedArray> code_table = GetCompiledModule(*instance)->code_table();
   RelocateMemoryReferencesInCode(code_table, old_mem_start, new_mem_start,
                                  old_size, new_size);
+  Handle<Object> memory_object(instance->GetInternalField(kWasmMemObject),
+                               isolate);
+  if (!memory_object->IsUndefined(isolate)) {
+    WasmJs::SetWasmMemoryArrayBuffer(isolate, memory_object, buffer);
+  }
+
   DCHECK(old_size % WasmModule::kPageSize == 0);
   return (old_size / WasmModule::kPageSize);
 }
 
 void testing::ValidateInstancesChain(Isolate* isolate,
                                      Handle<JSObject> wasm_module,
                                      int instance_count) {
   CHECK_GE(instance_count, 0);
   DisallowHeapAllocation no_gc;
   WasmCompiledModule* compiled_module =
@@ skipping 62 matching lines @@
     CHECK_NOT_NULL(result.val);
     module = const_cast<WasmModule*>(result.val);
   }
 
   Handle<WasmModuleWrapper> module_wrapper =
       WasmModuleWrapper::New(isolate, module);
 
   compiled_module->set_module_wrapper(module_wrapper);
   DCHECK(WasmCompiledModule::IsWasmCompiledModule(*compiled_module));
 }