Replace cc::ViewportSelectionBound with gfx::SelectionBound

cc/output/viewport_selection_bound.cc

Index: cc/output/viewport_selection_bound.cc
diff --git a/cc/output/viewport_selection_bound.cc b/cc/output/viewport_selection_bound.cc
deleted file mode 100644
index 75a38d698d95deafc9ba958d0ae17d858c5f6ae2..0000000000000000000000000000000000000000
--- a/cc/output/viewport_selection_bound.cc
+++ /dev/null
@@ -1,27 +0,0 @@
-// 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.edge_top == rhs.edge_top && lhs.edge_bottom == rhs.edge_bottom;
-}
-
-bool operator!=(const ViewportSelectionBound& lhs,
-                const ViewportSelectionBound& rhs) {
-  return !(lhs == rhs);
-}
-
-}  // namespace cc