[wasm] Remove three fields from wasm object

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 460 matching lines @@
 Handle<String> GetWasmFunctionName(Isolate* isolate, Handle<Object> wasm,
                                    uint32_t func_index);
 
 // Extract a function name from the given wasm object.
 // Returns a null handle if the function is unnamed or the name is not a valid
 // UTF-8 string.
 Handle<Object> GetWasmFunctionNameOrNull(Isolate* isolate, Handle<Object> wasm,
                                          uint32_t func_index);
 
 // Return the binary source bytes of a wasm module.
-SeqOneByteString* GetWasmBytes(JSObject* wasm);
+Handle<SeqOneByteString> GetWasmBytes(Handle<JSObject> wasm);
 
 // Get the debug info associated with the given wasm object.
 // If no debug info exists yet, it is created automatically.
 Handle<WasmDebugInfo> GetDebugInfo(Handle<JSObject> wasm);
 
 // Return the number of functions in the given wasm object.
-int GetNumberOfFunctions(JSObject* wasm);
+int GetNumberOfFunctions(Handle<JSObject> wasm);
 
 // Create and export JSFunction
 Handle<JSFunction> WrapExportCodeAsJSFunction(Isolate* isolate,
                                               Handle<Code> export_code,
                                               Handle<String> name, int arity,
                                               MaybeHandle<ByteArray> signature,
                                               Handle<JSObject> module_instance);
 
 // Check whether the given object is a wasm object.
 // This checks the number and type of internal fields, so it's not 100 percent
@@ skipping 24 matching lines @@
 V8_EXPORT_PRIVATE MaybeHandle<JSObject> CreateModuleObjectFromBytes(
     Isolate* isolate, const byte* start, const byte* end, ErrorThrower* thrower,
     ModuleOrigin origin);
 
 V8_EXPORT_PRIVATE bool ValidateModuleBytes(Isolate* isolate, const byte* start,
                                            const byte* end,
                                            ErrorThrower* thrower,
                                            ModuleOrigin origin);
 
 // Get the number of imported functions for a WASM instance.
-uint32_t GetNumImportedFunctions(Handle<JSObject> wasm_object);
+int GetNumImportedFunctions(Handle<JSObject> wasm_object);
 
 // 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.
 Object* GetOwningWasmInstance(Code* code);
 
 int32_t GetInstanceMemorySize(Isolate* isolate, Handle<JSObject> instance);
 
 int32_t GrowInstanceMemory(Isolate* isolate, Handle<JSObject> instance,
                            uint32_t pages);
 
 namespace testing {
 
 void ValidateInstancesChain(Isolate* isolate, Handle<JSObject> module_obj,
                             int instance_count);
 void ValidateModuleState(Isolate* isolate, Handle<JSObject> module_obj);
 void ValidateOrphanedInstance(Isolate* isolate, Handle<JSObject> instance);
 
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_