Avoid exposing cc::Layer tree to CompositorProxy

third_party/WebKit/Source/web/CompositorMutatorImpl.cpp

Index: third_party/WebKit/Source/web/CompositorMutatorImpl.cpp
diff --git a/third_party/WebKit/Source/web/CompositorMutatorImpl.cpp b/third_party/WebKit/Source/web/CompositorMutatorImpl.cpp
index a7d835295758a21c7d0ee4caae64ddebbcba075f..64b2914890c95d32dd0850991657e4a4e6565e2f 100644
--- a/third_party/WebKit/Source/web/CompositorMutatorImpl.cpp
+++ b/third_party/WebKit/Source/web/CompositorMutatorImpl.cpp
@@ -94,4 +94,19 @@ void CompositorMutatorImpl::setNeedsMutate() {
   m_client->setNeedsMutate();
 }
 
+void CompositorMutatorImpl::registerCompositorProxy(
+    const CompositorProxy* proxy) {
+  TRACE_EVENT0("compositor-worker",
+               "CompositorMutatorImpl::registerCompositorProxy");
+  m_client->registerCompositorProxy(proxy->proxyId(), proxy->elementId(),
+                                    proxy->compositorMutableProperties());
+}
+
+void CompositorMutatorImpl::unregisterCompositorProxy(
+    const CompositorProxy* proxy) {
+  TRACE_EVENT0("compositor-worker",
+               "CompositorMutatorImpl::unregisterCompositorProxy");
+  m_client->unregisterCompositorProxy(proxy->proxyId());
+}
+
 }  // namespace blink