Added wm::IsWindowUserPositionable(...) method in window_util.h.

ash/wm/window_util.cc

Index: ash/wm/window_util.cc
diff --git a/ash/wm/window_util.cc b/ash/wm/window_util.cc
index e05ae2fb3bbe6990e6a78893a0e0414384610251..a0fb399314fe86188a1edd59ab76789503e4ae0e 100644
--- a/ash/wm/window_util.cc
+++ b/ash/wm/window_util.cc
@@ -77,6 +77,10 @@ bool IsWindowMinimized(aura::Window* window) {
   return ash::wm::GetWindowState(window)->IsMinimized();
 }
 
+bool IsWindowUserPositionable(aura::Window* window) {
+  return GetWindowState(window)->IsUserPositionable();
+}
+
 void CenterWindow(aura::Window* window) {
   wm::WMEvent event(wm::WM_EVENT_CENTER);
   wm::GetWindowState(window)->OnWMEvent(&event);