Remove parts of //cc we aren't using

cc/output/viewport_selection_bound.h

-// Copyright 2014 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 CC_OUTPUT_VIEWPORT_SELECTION_BOUND_H_
-#define CC_OUTPUT_VIEWPORT_SELECTION_BOUND_H_
-
-#include "cc/base/cc_export.h"
-#include "cc/input/selection_bound_type.h"
-#include "ui/gfx/geometry/point_f.h"
-
-namespace cc {
-
-// Marker for a selection end-point in (DIP) viewport coordinates.
-struct CC_EXPORT ViewportSelectionBound {
-  ViewportSelectionBound();
-  ~ViewportSelectionBound();
-
-  SelectionBoundType type;
-  gfx::PointF edge_top;
-  gfx::PointF edge_bottom;
-  bool visible;
-};
-
-CC_EXPORT bool operator==(const ViewportSelectionBound& lhs,
-                          const ViewportSelectionBound& rhs);
-CC_EXPORT bool operator!=(const ViewportSelectionBound& lhs,
-                          const ViewportSelectionBound& rhs);
-
-}  // namespace cc
-
-#endif  // CC_OUTPUT_VIEWPORT_SELECTION_BOUND_H_