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..31e717465718bad7dc6c5609b254ba1aafe93b38
--- /dev/null
+++ b/Source/platform/exported/WebCompositedDisplayList.cpp
@@ -0,0 +1,32 @@
+// 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 {
+
+WebCompositedDisplayList::WebCompositedDisplayList()
+{
+}
+
+WebCompositedDisplayList::WebCompositedDisplayList(PassOwnPtr<CompositedDisplayList> passImpl)
+    : m_private(passImpl)
+{
+}
+
+WebCompositedDisplayList::~WebCompositedDisplayList()
+{
+    // WebPrivateOwnPtr requires explicit clearing here.
+    m_private.reset(nullptr);
+}
+
+CompositedDisplayList* WebCompositedDisplayList::compositedDisplayListForTesting()
+{
+    return m_private.get();
+}
+
+} // namespace blink