[compositorworker] Register compositor proxies with proxy client

third_party/WebKit/Source/core/dom/CompositorProxyClient.h

Index: third_party/WebKit/Source/core/dom/CompositorProxyClient.h
diff --git a/third_party/WebKit/Source/core/dom/CompositorProxyClient.h b/third_party/WebKit/Source/core/dom/CompositorProxyClient.h
index 9f9cea1630df55fab6cf18a20aba27a882066311..ea6e09c250fbb2c22c847facaacd7ef2498e03b2 100644
--- a/third_party/WebKit/Source/core/dom/CompositorProxyClient.h
+++ b/third_party/WebKit/Source/core/dom/CompositorProxyClient.h
@@ -30,6 +30,8 @@ public:
 
     virtual void setGlobalScope(WorkerGlobalScope*) = 0;
     virtual void requestAnimationFrame() = 0;
+    virtual void registerCompositorProxy(CompositorProxy*) = 0;

[jbroman, 2016/06/10 19:29:33]

Please add comments clarifying the semantics of registration/unregistration. In
particular, there is the subtle point that "unregister" will only be called for
explicit disconnect calls, but that subclasses are expected to also handle the
object being collected (e.g. using WeakMember) without being unregistered first.

[majidvp, 2016/06/10 20:56:30]

Done.

+    virtual void unregisterCompositorProxy(CompositorProxy*) = 0;
 };
 
 CORE_EXPORT void provideCompositorProxyClientTo(WorkerClients*, CompositorProxyClient*);