[iwyu] Include handles.h less.

test/common/wasm/wasm-module-runner.h

 // Copyright 2016 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_RUNNER_H_
 #define V8_WASM_MODULE_RUNNER_H_
 
-#include "src/handles.h"
 #include "src/isolate.h"
 #include "src/objects.h"
 #include "src/wasm/wasm-interpreter.h"
 #include "src/wasm/wasm-module.h"
 #include "src/wasm/wasm-objects.h"
 #include "src/wasm/wasm-result.h"
 #include "src/zone/zone.h"
 
 namespace v8 {
 namespace internal {
+
+template <typename T>
+class Handle;
+
 namespace wasm {
 namespace testing {
 
 // Decodes the given encoded module.
 const WasmModule* DecodeWasmModuleForTesting(
     Isolate* isolate, ErrorThrower* thrower, const byte* module_start,
     const byte* module_end, ModuleOrigin origin, bool verify_functions = false);
 
 // Instantiates a module without any imports and exports.
 const Handle<WasmInstanceObject> InstantiateModuleForTesting(
@@ skipping 29 matching lines @@
                                 int argc, Handle<Object> argv[],
                                 ModuleOrigin origin);
 // Install function map, module symbol for testing
 void SetupIsolateForWasmModule(Isolate* isolate);
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_RUNNER_H_