Remove uses of std::unary_function and std::binary_function.

ash/wm/overview/window_selector.cc

 // Copyright 2013 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 "ash/wm/overview/window_selector.h"
 
 #include <algorithm>
 #include <functional>
 #include <set>
 #include <utility>
@@ skipping 55 matching lines @@
 static const ::ui::ResourceBundle::FontStyle kTextFilterFontStyle =
     ::ui::ResourceBundle::FontStyle::MediumFont;
 
 // The alpha value for the background of the text filtering textbox.
 const unsigned char kTextFilterOpacity = 180;
 
 // The radius used for the rounded corners on the text filtering textbox.
 const int kTextFilterCornerRadius = 1;
 
 // A comparator for locating a grid with a given root window.
-struct RootWindowGridComparator
-    : public std::unary_function<WindowGrid*, bool> {
+struct RootWindowGridComparator {
   explicit RootWindowGridComparator(const aura::Window* root_window)
       : root_window_(root_window) {
   }
 
   bool operator()(WindowGrid* grid) const {
     return (grid->root_window() == root_window_);
   }
 
   const aura::Window* root_window_;
 };
 
 // A comparator for locating a selectable window given a targeted window.
-struct WindowSelectorItemTargetComparator
-    : public std::unary_function<WindowSelectorItem*, bool> {
+struct WindowSelectorItemTargetComparator {
   explicit WindowSelectorItemTargetComparator(const aura::Window* target_window)
       : target(target_window) {
   }
 
   bool operator()(WindowSelectorItem* window) const {
     return window->GetWindow() == target;
   }
 
   const aura::Window* target;
 };
 
 // A comparator for locating a selector item for a given root.
-struct WindowSelectorItemForRoot
-    : public std::unary_function<WindowSelectorItem*, bool> {
+struct WindowSelectorItemForRoot {
   explicit WindowSelectorItemForRoot(const aura::Window* root)
       : root_window(root) {
   }
 
   bool operator()(WindowSelectorItem* item) const {
     return item->root_window() == root_window;
   }
 
   const aura::Window* root_window;
 };
@@ skipping 522 matching lines @@
   for (size_t i = 0;
       i <= grid_list_.size() &&
       grid_list_[selected_grid_index_]->Move(direction, animate); i++) {
     selected_grid_index_ =
         (selected_grid_index_ + display_direction + grid_list_.size()) %
         grid_list_.size();
   }
 }
 
 }  // namespace ash