[wasm] Cleanup unneeded casts to WasmInstanceObject

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/adapters.h"
 #include "src/base/atomic-utils.h"
 #include "src/code-stubs.h"
 #include "src/compiler/wasm-compiler.h"
@@ skipping 768 matching lines @@
     os << "?";
   }
   return os;
 }
 
 WasmInstanceObject* wasm::GetOwningWasmInstance(Code* code) {
   DCHECK(code->kind() == Code::WASM_FUNCTION);
   DisallowHeapAllocation no_gc;
   FixedArray* deopt_data = code->deoptimization_data();
   DCHECK_NOT_NULL(deopt_data);
-  DCHECK(deopt_data->length() == 2);
+  DCHECK_EQ(2, deopt_data->length());
   Object* weak_link = deopt_data->get(0);
   DCHECK(weak_link->IsWeakCell());
   WeakCell* cell = WeakCell::cast(weak_link);
   if (!cell->value()) return nullptr;
   return WasmInstanceObject::cast(cell->value());
 }
 
 int wasm::GetFunctionCodeOffset(Handle<WasmCompiledModule> compiled_module,
                                 int func_index) {
   return GetFunctionOffsetAndLength(compiled_module, func_index).first;
@@ skipping 1508 matching lines @@
   CHECK(!compiled_module->has_weak_owning_instance());
 }
 
 void testing::ValidateOrphanedInstance(Isolate* isolate,
                                        Handle<WasmInstanceObject> instance) {
   DisallowHeapAllocation no_gc;
   WasmCompiledModule* compiled_module = instance->get_compiled_module();
   CHECK(compiled_module->has_weak_wasm_module());
   CHECK(compiled_module->ptr_to_weak_wasm_module()->cleared());
 }