compositor-worker: cc->blink mutation plumbing

third_party/WebKit/public/platform/WebCompositorMutatorClient.h

Index: third_party/WebKit/public/platform/WebCompositorMutatorClient.h
diff --git a/third_party/WebKit/public/platform/WebCompositorMutatorClient.h b/third_party/WebKit/public/platform/WebCompositorMutatorClient.h
new file mode 100644
index 0000000000000000000000000000000000000000..9bba81531872bfefe6f6be3c0111627ae0f45109
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+++ b/third_party/WebKit/public/platform/WebCompositorMutatorClient.h
@@ -0,0 +1,21 @@
+// 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.
+
+#ifndef WebCompositorMutatorClient_h
+#define WebCompositorMutatorClient_h
+
+#include "WebCommon.h"
+#include "cc/animation/layer_tree_mutator.h"
+
+namespace blink {
+
+// This is used by the compositor to invoke compositor worker callbacks.
+class BLINK_PLATFORM_EXPORT WebCompositorMutatorClient : public cc::LayerTreeMutator {
+public:
+    virtual ~WebCompositorMutatorClient() {}
+};
+
+} // namespace blink
+
+#endif // WebCompositorMutatorClient_h