Revert of [wasm] WebAssembly.Memory object can be referenced by multiple Instance objects.

src/wasm/wasm-module.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_MODULE_H_
 #define V8_WASM_MODULE_H_
 
 #include <memory>
 
 #include "src/api.h"
@@ skipping 404 matching lines @@
 // Translate from byte offset in the module to function number and byte offset
 // within that function, encoded as line and column in the position info.
 bool GetPositionInfo(Handle<WasmCompiledModule> compiled_module,
                      uint32_t position, Script::PositionInfo* info);
 
 // Assumed to be called with a code object associated to a wasm module instance.
 // Intended to be called from runtime functions.
 // Returns nullptr on failing to get owning instance.
 WasmInstanceObject* GetOwningWasmInstance(Code* code);
 
-MaybeHandle<JSArrayBuffer> GetInstanceMemory(Isolate* isolate,
-                                             Handle<JSObject> instance);
+MaybeHandle<JSArrayBuffer> GetInstanceMemory(
+    Isolate* isolate, Handle<WasmInstanceObject> instance);
 
 int32_t GetInstanceMemorySize(Isolate* isolate,
                               Handle<WasmInstanceObject> instance);
 
 int32_t GrowInstanceMemory(Isolate* isolate,
                            Handle<WasmInstanceObject> instance, uint32_t pages);
 
 Handle<JSArrayBuffer> NewArrayBuffer(Isolate* isolate, size_t size,
                                      bool enable_guard_regions);
 
-int32_t GetInstanceMemorySize(Isolate* isolate, Handle<JSObject> instance);
-
-int32_t GrowWebAssemblyMemory(Isolate* isolate, Handle<Object> receiver,
-                              uint32_t pages);
-
-int32_t GrowMemory(Isolate* isolate, Handle<WasmInstanceObject> instance,
-                   uint32_t pages);
-
 void UpdateDispatchTables(Isolate* isolate, Handle<FixedArray> dispatch_tables,
                           int index, Handle<JSFunction> js_function);
 
 namespace testing {
 
 void ValidateInstancesChain(Isolate* isolate,
                             Handle<WasmModuleObject> module_obj,
                             int instance_count);
 void ValidateModuleState(Isolate* isolate, Handle<WasmModuleObject> module_obj);
 void ValidateOrphanedInstance(Isolate* isolate,
                               Handle<WasmInstanceObject> instance);
 
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_