[mus+ash] Removes WmWindow from ash (app_list, frame, metrics, session, system, wallpaper)

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 b1bba1c18985b55c02017a6152b8cf1b1833c3af..b5be29db4a3da2e0c6641e660dc7c8cf3740a2d4 100644
--- a/ash/wm/window_util.cc
+++ b/ash/wm/window_util.cc
@@ -12,6 +12,7 @@
 #include "ash/shelf/shelf.h"
 #include "ash/shell.h"
 #include "ash/shell_port.h"
+#include "ash/wm/resize_handle_window_targeter.h"
 #include "ash/wm/widget_finder.h"
 #include "ash/wm/window_properties.h"
 #include "ash/wm/window_state.h"
@@ -197,5 +198,12 @@ void RemoveLimitedPreTargetHandlerForWindow(ui::EventHandler* handler,
   window->RemovePreTargetHandler(handler);
 }
 
+void InstallResizeHandleWindowTargeterForWindow(
+    aura::Window* window,
+    ImmersiveFullscreenController* immersive_fullscreen_controller) {
+  window->SetEventTargeter(base::MakeUnique<ResizeHandleWindowTargeter>(
+      window, immersive_fullscreen_controller));
+}
+
 }  // namespace wm
 }  // namespace ash