ash: Use stl utilities from the base namespace

ash/wm/workspace/multi_window_resize_controller_unittest.cc

Index: ash/wm/workspace/multi_window_resize_controller_unittest.cc
diff --git a/ash/wm/workspace/multi_window_resize_controller_unittest.cc b/ash/wm/workspace/multi_window_resize_controller_unittest.cc
index c3f5fbcdb274a1bb03d91f12fc7d6c6d03c25403..305f82bc2428a8ba615cafc3f20ce68e68af8cb1 100644
--- a/ash/wm/workspace/multi_window_resize_controller_unittest.cc
+++ b/ash/wm/workspace/multi_window_resize_controller_unittest.cc
@@ -89,7 +89,8 @@ class MultiWindowResizeControllerTest : public test::AshTestBase {
     if ((resize_controller_->windows_.window1 == wm_window ||
          resize_controller_->windows_.window2 == wm_window))
       return true;
-    return ContainsValue(resize_controller_->windows_.other_windows, wm_window);
+    return base::ContainsValue(resize_controller_->windows_.other_windows,
+                               wm_window);
   }
 
   bool IsOverWindows(const gfx::Point& loc) {