[iwyu] Include handles.h less.

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

Index: test/common/wasm/wasm-module-runner.h
diff --git a/test/common/wasm/wasm-module-runner.h b/test/common/wasm/wasm-module-runner.h
index ed6ad880318dfbda6c6e515c7332a2626fc03ace..4d58513c14c923f5427844ebf5476395640c7ce1 100644
--- a/test/common/wasm/wasm-module-runner.h
+++ b/test/common/wasm/wasm-module-runner.h
@@ -5,7 +5,6 @@
 #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"
@@ -16,6 +15,10 @@
 
 namespace v8 {
 namespace internal {
+
+template <typename T>
+class Handle;
+
 namespace wasm {
 namespace testing {