Plumb CompositedDisplayList to WebViewImpl

Source/platform/exported/WebCompositedDisplayList.cpp

Index: Source/platform/exported/WebCompositedDisplayList.cpp
diff --git a/Source/platform/exported/WebCompositedDisplayList.cpp b/Source/platform/exported/WebCompositedDisplayList.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..68c476a4b4437ad076934219b819a209a20f2c15
--- /dev/null
+++ b/Source/platform/exported/WebCompositedDisplayList.cpp
@@ -0,0 +1,28 @@
+// Copyright 2015 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 "config.h"
+#include "public/platform/WebCompositedDisplayList.h"
+
+#include "platform/graphics/CompositedDisplayList.h"
+
+namespace blink {
+
+void WebCompositedDisplayList::assign(PassOwnPtr<CompositedDisplayList> compositedDisplayList)
+{
+    m_private.reset(compositedDisplayList);
+}
+
+WebCompositedDisplayList::~WebCompositedDisplayList()
+{
+    // WebPrivateOwnPtr requires explicit clearing here.
+    m_private.reset(nullptr);
+}
+
+CompositedDisplayList* WebCompositedDisplayList::compositedDisplayListForTesting()
+{
+    return m_private.get();
+}
+
+} // namespace blink