Removes most aura dependencies from WindowResizer

ash/autoclick/autoclick_controller.cc

Index: ash/autoclick/autoclick_controller.cc
diff --git a/ash/autoclick/autoclick_controller.cc b/ash/autoclick/autoclick_controller.cc
index ed1b58000f5a7c5e537cb22c7ee6f0cf8275218e..47846dcaa5aeea29c7d3746c709a2f1f3662f220 100644
--- a/ash/autoclick/autoclick_controller.cc
+++ b/ash/autoclick/autoclick_controller.cc
@@ -5,7 +5,8 @@
 #include "ash/autoclick/autoclick_controller.h"
 
 #include "ash/shell.h"
-#include "ash/wm/coordinate_conversion.h"
+#include "ash/wm/aura/wm_window_aura.h"
+#include "ash/wm/common/root_window_finder.h"
 #include "base/timer/timer.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window_tree_host.h"
@@ -178,7 +179,8 @@ void AutoclickControllerImpl::OnScrollEvent(ui::ScrollEvent* event) {
 void AutoclickControllerImpl::DoAutoclick() {
   gfx::Point screen_location =
       aura::Env::GetInstance()->last_mouse_location();
-  aura::Window* root_window = wm::GetRootWindowAt(screen_location);
+  aura::Window* root_window =
+      wm::WmWindowAura::GetAuraWindow(wm::GetRootWindowAt(screen_location));
   DCHECK(root_window) << "Root window not found while attempting autoclick.";
 
   gfx::Point click_location(screen_location);