[wasm] Remove obsolete {WasmCompiledModule::Reset} method.

In the two remaining places that call the {Reset} method, it is already
guaranteed that the {next_instance} and {prev_instance} is undefined.

R=titzer@chromium.org

Change-Id: Iab2e764d88b7ba710c664fea363951fb6f9132e0
Reviewed-on: https://chromium-review.googlesource.com/1113551Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54009}

src/wasm/wasm-objects.cc

@@ -1411,9 +1411,7 @@ void InstanceFinalizer(const v8::WeakCallbackInfo<void>& data) {
   WasmCompiledModule* current_template = module_object->compiled_module();
   DCHECK(!current_template->has_prev_instance());
   if (current_template == compiled_module) {
-    if (!compiled_module->has_next_instance()) {
-      WasmCompiledModule::Reset(isolate, compiled_module);
-    } else {
+    if (compiled_module->has_next_instance()) {
       module_object->set_compiled_module(compiled_module->next_instance());
     }
   }
@@ -1517,13 +1515,6 @@ Handle<WasmCompiledModule> WasmCompiledModule::Clone(
   return ret;
 }
 
-void WasmCompiledModule::Reset(Isolate* isolate,
-                               WasmCompiledModule* compiled_module) {
-  DisallowHeapAllocation no_gc;
-  compiled_module->reset_prev_instance();
-  compiled_module->reset_next_instance();
-}
-
 void WasmCompiledModule::InsertInChain(WasmModuleObject* module) {
   DisallowHeapAllocation no_gc;
   WasmCompiledModule* original = module->compiled_module();

src/wasm/wasm-objects.h

@@ -573,7 +573,6 @@ class WasmCompiledModule : public Struct {
 
   static Handle<WasmCompiledModule> Clone(Isolate* isolate,
                                           Handle<WasmCompiledModule> module);
-  static void Reset(Isolate* isolate, WasmCompiledModule* module);
 
   bool has_instance() const;
 

src/wasm/wasm-serialization.cc

@@ -550,8 +550,6 @@ MaybeHandle<WasmModuleObject> DeserializeNativeModule(
   Handle<WasmModuleObject> module_object = WasmModuleObject::New(
       isolate, export_wrappers, std::move(decode_result.val), env,
       std::move(wire_bytes_copy), wire_size, script, Handle<ByteArray>::null());
-  Handle<WasmCompiledModule> compiled_module(module_object->compiled_module(),
-                                             isolate);
   NativeModule* native_module = module_object->native_module();
 
   if (FLAG_wasm_lazy_compilation) {
@@ -568,10 +566,6 @@ MaybeHandle<WasmModuleObject> DeserializeNativeModule(
   CodeSpaceMemoryModificationScope modification_scope(isolate->heap());
   CompileJsToWasmWrappers(isolate, module_object, isolate->counters());
 
-  // There are no instances for this module yet, which means we need to reset
-  // the module into a state as if the last instance was collected.
-  WasmCompiledModule::Reset(isolate, *compiled_module);
-
   // Log the code within the generated module for profiling.
   native_module->LogWasmCodes(isolate);