Introduce WorkletGlobalScopeProxy interface.

third_party/WebKit/Source/modules/compositorworker/CompositorWorkletGlobalScopeProxy.cpp

Index: third_party/WebKit/Source/modules/compositorworker/CompositorWorkletGlobalScopeProxy.cpp
diff --git a/third_party/WebKit/Source/modules/compositorworker/CompositorWorkletGlobalScopeProxy.cpp b/third_party/WebKit/Source/modules/compositorworker/CompositorWorkletGlobalScopeProxy.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b0569b2a9b3b94886c592344a4f2698621ca57a9
--- /dev/null
+++ b/third_party/WebKit/Source/modules/compositorworker/CompositorWorkletGlobalScopeProxy.cpp
@@ -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.
+
+#include "modules/compositorworker/CompositorWorkletGlobalScopeProxy.h"
+
+#include "modules/compositorworker/CompositorWorkletThread.h"
+#include "modules/worklet/ThreadedWorkletGlobalScopeProxy.h"
+
+namespace blink {
+
+CompositorWorkletGlobalScopeProxy::CompositorWorkletGlobalScopeProxy(const KURL& url, const String& userAgent, PassRefPtr<SecurityOrigin> securityOrigin)
+    : ThreadedWorkletGlobalScopeProxy(CompositorWorkletThread::create(url, userAgent, securityOrigin))
+{
+}
+
+CompositorWorkletGlobalScopeProxy::~CompositorWorkletGlobalScopeProxy()
+{
+}
+
+} // namespace blink