BoxedV8Module: Mark as final

Mark BoxedV8Module as final to avoid problems when having no virtual destructor
which depends on TraceWrapperV8Reference.

Change-Id: Ibab44d1c52f87bc099c0eca7602b175345e4cb2d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1841632
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Commit-Queue: Kentaro Hara <haraken@chromium.org>
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702896}

third_party/blink/renderer/bindings/core/v8/boxed_v8_module.h

@@ -18,7 +18,7 @@ namespace blink {
 // Hash of Member<BoxedV8Module> overrides HashTraits.
 // Therefore, BoxedV8Module can be a key/value type of WTF::HashMap,
 // HashSet,HashTable by using BoxedV8ModuleHash.
-class CORE_EXPORT BoxedV8Module : public GarbageCollected<BoxedV8Module> {
+class CORE_EXPORT BoxedV8Module final : public GarbageCollected<BoxedV8Module> {
  public:
   BoxedV8Module(v8::Isolate* isolate, v8::Local<v8::Module> module)
       : record_(isolate, module),