chromeos: converts ash devtools to aura::Window

ui/wm/core/window_util.cc

Index: ui/wm/core/window_util.cc
diff --git a/ui/wm/core/window_util.cc b/ui/wm/core/window_util.cc
index 58e488594402bb5a407fbe47573604d8aa916e4c..7d72e58248695bc4c56187d26406b4e2d4947e88 100644
--- a/ui/wm/core/window_util.cc
+++ b/ui/wm/core/window_util.cc
@@ -67,11 +67,11 @@ void DeactivateWindow(aura::Window* window) {
       window);
 }
 
-bool IsActiveWindow(aura::Window* window) {
+bool IsActiveWindow(const aura::Window* window) {
   DCHECK(window);
   if (!window->GetRootWindow())
     return false;
-  aura::client::ActivationClient* client =
+  const aura::client::ActivationClient* client =
       aura::client::GetActivationClient(window->GetRootWindow());
   return client && client->GetActiveWindow() == window;
 }