Plumb selection edge points through the compositor

cc/output/viewport_selection_bound.cc

 // 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.
 
 #include "cc/output/viewport_selection_bound.h"
 
 namespace cc {
 
 ViewportSelectionBound::ViewportSelectionBound()
     : type(SELECTION_BOUND_EMPTY), visible(false) {
 }
 
 ViewportSelectionBound::~ViewportSelectionBound() {
 }
 
 bool operator==(const ViewportSelectionBound& lhs,
                 const ViewportSelectionBound& rhs) {
   return lhs.type == rhs.type && lhs.visible == rhs.visible &&
-         lhs.viewport_rect == rhs.viewport_rect;
+         lhs.edge_top == rhs.edge_top && lhs.edge_bottom == rhs.edge_bottom;
 }
 
 bool operator!=(const ViewportSelectionBound& lhs,
                 const ViewportSelectionBound& rhs) {
   return !(lhs == rhs);
 }
 
 }  // namespace cc