[compositorworker] Register compositor proxies with proxy client

third_party/WebKit/Source/web/CompositorProxyClientImpl.h

Index: third_party/WebKit/Source/web/CompositorProxyClientImpl.h
diff --git a/third_party/WebKit/Source/web/CompositorProxyClientImpl.h b/third_party/WebKit/Source/web/CompositorProxyClientImpl.h
index 767117edd37e7750ebb97832ab30f914d5746c9a..c218c3fcd36abf726040aa5b926e6b39a082b324 100644
--- a/third_party/WebKit/Source/web/CompositorProxyClientImpl.h
+++ b/third_party/WebKit/Source/web/CompositorProxyClientImpl.h
@@ -6,6 +6,7 @@
 #define CompositorProxyClientImpl_h
 
 #include "core/dom/CompositorProxyClient.h"
+#include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
@@ -33,6 +34,8 @@ public:
     // CompositorProxyClient:
     void setGlobalScope(WorkerGlobalScope*) override;
     void requestAnimationFrame() override;
+    void registerCompositorProxy(CompositorProxy*) override;
+    void unregisterCompositorProxy(CompositorProxy*) override;
 
 private:
     bool executeAnimationFrameCallbacks(double monotonicTimeNow);
@@ -41,6 +44,10 @@ private:
 
     Member<CompositorWorkerGlobalScope> m_globalScope;
     bool m_requestedAnimationFrameCallbacks;
+
+    typedef HeapHashSet<WeakMember<CompositorProxy>> ProxySet;
+    typedef HeapHashMap<uint64_t, Member<ProxySet>> ProxyMap;

[jbroman, 2016/06/10 19:29:34]

One thing to watch out for here: if the last object to die here dies without
being explicitly disconnected, the set will become empty but the entry won't be
removed from the map. That may cause memory to increase over time.

(But I don't know what the ideal way to handle this from an Oilpan standpoint
is; haraken can probably offer advice.)

+    ProxyMap m_proxyMap;
 };
 
 } // namespace blink