ui: use base's ContainsValue helper function instead of std::find

ui/wm/core/window_animations.cc

Index: ui/wm/core/window_animations.cc
diff --git a/ui/wm/core/window_animations.cc b/ui/wm/core/window_animations.cc
index 129cfda8b22facd180dd5bd77c0993fe2729b057..8b60e556618a2914e9e4c158001b1f5c987a53c3 100644
--- a/ui/wm/core/window_animations.cc
+++ b/ui/wm/core/window_animations.cc
@@ -95,9 +95,7 @@ class HidingWindowAnimationObserverBase : public aura::WindowObserver {
       DCHECK(iter != window_->parent()->children().end());
       aura::Window* topmost_transient_child = NULL;
       for (++iter; iter != window_->parent()->children().end(); ++iter) {
-        if (std::find(transient_children.begin(),
-                      transient_children.end(),
-                      *iter) != transient_children.end()) {
+        if (ContainsValue(transient_children, *iter)) {

[sky, 2015/12/01 22:08:31]

nit: nuke {}

[tfarina, 2015/12/02 20:31:41]

Done.

           topmost_transient_child = *iter;
         }
       }