Plumb selection edge points through the compositor

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/rect_f.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::RectF viewport_rect;
+  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_