[Line Layout API] Add shim for Paint objects to access underlying LayoutObject

Source/core/paint/LineLayoutPaintShim.h

+// 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.
+
+#ifndef LineLayoutPaintShim_h
+#define LineLayoutPaintShim_h
+
+#include "core/layout/LayoutObject.h"

[leviw_travelin_and_unemployed, 2015/08/26 17:54:04]

You should just be able to forward declare class LayoutObject;

+#include "core/layout/api/LineLayoutItem.h"
+
+namespace blink {
+
+// TODO(pilgrim): remove this kludge once Paint objects have a real API and no longer need access to the underlying LayoutObject

[leviw_travelin_and_unemployed, 2015/08/26 17:54:04]

Nit: capitalize remove and add a period.

+class LineLayoutPaintShim {
+public:
+    static LayoutObject* layoutObjectFrom(LineLayoutItem item)
+    {
+        return item.layoutObject();
+    }
+};
+
+} // namespace blink
+
+#endif // LineLayoutPaintShim_h