CompositorWorkerProxyClientImpl to CompositorProxy cross thread reference is using WeakMember

third_party/WebKit/Source/modules/compositorworker/CompositorWorkerThreadTest.cpp

Index: third_party/WebKit/Source/modules/compositorworker/CompositorWorkerThreadTest.cpp
diff --git a/third_party/WebKit/Source/modules/compositorworker/CompositorWorkerThreadTest.cpp b/third_party/WebKit/Source/modules/compositorworker/CompositorWorkerThreadTest.cpp
index 6598af7b041e9cb5abafa1252a6996dcb52acc7a..cd34e2fdcdb8d85db96f06dcd27a6d039d9d0442 100644
--- a/third_party/WebKit/Source/modules/compositorworker/CompositorWorkerThreadTest.cpp
+++ b/third_party/WebKit/Source/modules/compositorworker/CompositorWorkerThreadTest.cpp
@@ -62,15 +62,18 @@ class TestCompositorWorkerObjectProxy : public InProcessWorkerObjectProxy {
       : InProcessWorkerObjectProxy(nullptr, parentFrameTaskRunners) {}
 };
 
-class TestCompositorWorkerProxyClient : public CompositorWorkerProxyClient {
+class TestCompositorWorkerProxyClient
+    : public GarbageCollected<TestCompositorWorkerProxyClient>,
+      public CompositorWorkerProxyClient {
+  USING_GARBAGE_COLLECTED_MIXIN(TestCompositorWorkerProxyClient);
+
  public:
   TestCompositorWorkerProxyClient() {}
 
   void dispose() override {}
   void setGlobalScope(WorkerGlobalScope*) override {}
   void requestAnimationFrame() override {}
-  void registerCompositorProxy(CompositorProxy*) override {}
-  void unregisterCompositorProxy(CompositorProxy*) override {}
+  CompositorProxyClient* compositorProxyClient() override { return nullptr; };
 };
 
 class CompositorWorkerTestPlatform : public TestingPlatformSupport {