Fix preferred logical widths of orthogonal writing modes

third_party/WebKit/Source/core/frame/OrthogonalWritingModeRootList.h

Index: third_party/WebKit/Source/core/frame/OrthogonalWritingModeRootList.h
diff --git a/third_party/WebKit/Source/core/frame/OrthogonalWritingModeRootList.h b/third_party/WebKit/Source/core/frame/OrthogonalWritingModeRootList.h
new file mode 100644
index 0000000000000000000000000000000000000000..f18d9afe485d7c038ae1e0f92d83b57e8a633c36
--- /dev/null
+++ b/third_party/WebKit/Source/core/frame/OrthogonalWritingModeRootList.h
@@ -0,0 +1,47 @@
+// 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 OrthogonalWritingModeRootList_h
+#define OrthogonalWritingModeRootList_h
+
+#include "core/layout/DepthOrderedLayoutObjectList.h"
+#include "wtf/Allocator.h"
+#include "wtf/HashSet.h"
+#include "wtf/Vector.h"
+
+namespace blink {
+
+class OrthogonalWritingModeRootList : public DepthOrderedLayoutObjectList {
+    DISALLOW_NEW();
+public:
+    OrthogonalWritingModeRootList()
+        : m_isOrderedListDirty(false)
+        , m_isAnyRemoved(false)
+        , m_isIterating(false)
+    { }
+
+    void addRoot(LayoutObject& object)
+    {
+        m_roots.add(&object);
+        m_isOrderedListDirty = true;
+    }
+    void removeRoot(LayoutObject& object)
+    {
+        m_roots.remove(&object);
+        m_isOrderedListDirty = m_isAnyRemoved = true;
+    }
+
+    LayoutObject* takeDeepestRoot();
+
+private:
+    typedef Vector<LayoutObjectWithDepth>::reverse_iterator iterator;
+    iterator m_lastTaken;
+    bool m_isOrderedListDirty;
+    bool m_isAnyRemoved;
+    bool m_isIterating;
+};
+
+} // namespace blink
+
+#endif // OrthogonalWritingModeRootList_h