[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;
+    virtual void unregisterCompositorProxy(CompositorProxy*) = 0;

[jbroman, 2016/06/10 17:45:42]

Does this method have any call sites? I see the registration call site, but not
the deregistration site.

[majidvp, 2016/06/10 19:17:50]

It should be used in |CompositorProxy::disconnet| which may be called by script.
I was to hasty to remove that call site when switched to using weak map.

It is corrected now.

 };
 
 CORE_EXPORT void provideCompositorProxyClientTo(WorkerClients*, CompositorProxyClient*);