Enable immersive fullscreen for non-browser windows by default

ash/wm/window_state.cc

Index: ash/wm/window_state.cc
diff --git a/ash/wm/window_state.cc b/ash/wm/window_state.cc
index 185372e5eab24982323ab776eef30680cf98f4f5..7a5dacc79cbe5c91ffd02ff842192e99e53d9c0e 100644
--- a/ash/wm/window_state.cc
+++ b/ash/wm/window_state.cc
@@ -43,12 +43,11 @@ WindowState::WindowState(aura::Window* window)
 
 #if defined(OS_CHROMEOS)
   // NOTE(pkotwicz): Animating to immersive fullscreen does not look good. When
-  // the kAshEnableImmersiveFullscreenForAllWindows flag is set most windows
+  // switches::UseImmersiveFullscreenForAllWindows() returns true, most windows
   // can be put into immersive fullscreen. It is not worth the added complexity
   // to only animate to fullscreen if the window is put into immersive
   // fullscreen.
-  animate_to_fullscreen_ = !CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kAshEnableImmersiveFullscreenForAllWindows);
+  animate_to_fullscreen_ = !switches::UseImmersiveFullscreenForAllWindows();
 #endif
 }