Avoid exposing cc::Layer tree to CompositorProxy

third_party/WebKit/Source/web/CompositorMutatorImpl.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "web/CompositorMutatorImpl.h"
 
 #include "core/animation/CustomCompositorAnimationManager.h"
 #include "core/dom/CompositorProxy.h"
 #include "platform/CrossThreadFunctional.h"
 #include "platform/WaitableEvent.h"
@@ skipping 78 matching lines @@
   DCHECK(animators_.Contains(animator));
   animators_.erase(animator);
 }
 
 void CompositorMutatorImpl::SetNeedsMutate() {
   DCHECK(!IsMainThread());
   TRACE_EVENT0("compositor-worker", "CompositorMutatorImpl::setNeedsMutate");
   client_->SetNeedsMutate();
 }
 
+void CompositorMutatorImpl::RegisterCompositorProxy(
+    const CompositorProxy* proxy) {
+  TRACE_EVENT0("compositor-worker",
+               "CompositorMutatorImpl::registerCompositorProxy");
+  client_->RegisterCompositorProxy(proxy->ProxyId(), proxy->ElementId(),
+                                   proxy->CompositorMutableProperties());
+}
+
+void CompositorMutatorImpl::UnregisterCompositorProxy(
+    const CompositorProxy* proxy) {
+  TRACE_EVENT0("compositor-worker",
+               "CompositorMutatorImpl::unregisterCompositorProxy");
+  client_->UnregisterCompositorProxy(proxy->ProxyId());
+}
+
 }  // namespace blink