ui: Use stl utilities from the base namespace

ui/base/window_tracker_template.h

 // Copyright 2016 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 UI_BASE_WINDOW_TRACKER_TEMPLATE_H_
 #define UI_BASE_WINDOW_TRACKER_TEMPLATE_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 22 matching lines @@
   ~WindowTrackerTemplate() override {
     for (T* window : windows_)
       window->RemoveObserver(this);
   }
 
   // Returns the set of windows being observed.
   const WindowList& windows() const { return windows_; }
 
   // Adds |window| to the set of Windows being tracked.
   void Add(T* window) {
-    if (ContainsValue(windows_, window))
+    if (base::ContainsValue(windows_, window))
       return;
 
     window->AddObserver(this);
     windows_.push_back(window);
   }
 
   // Removes |window| from the set of windows being tracked.
   void Remove(T* window) {
     auto iter = std::find(windows_.begin(), windows_.end(), window);
     if (iter != windows_.end()) {
       window->RemoveObserver(this);
       windows_.erase(iter);
     }
   }
 
   T* Pop() {
     DCHECK(!windows_.empty());
     T* result = windows_[0];
     Remove(result);
     return result;
   }
 
   // Returns true if |window| was previously added and has not been removed or
   // deleted.
-  bool Contains(T* window) const { return ContainsValue(windows_, window); }
+  bool Contains(T* window) const {
+    return base::ContainsValue(windows_, window);
+  }
 
   // Observer overrides:
   void OnWindowDestroying(T* window) override {
     DCHECK(Contains(window));
     Remove(window);
   }
 
  private:
   WindowList windows_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTrackerTemplate);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_WINDOW_TRACKER_TEMPLATE_H_