Splits debug_commands into aura and non-aura parts

ash/mus/bridge/wm_root_window_controller_mus.cc

Index: ash/mus/bridge/wm_root_window_controller_mus.cc
diff --git a/ash/mus/bridge/wm_root_window_controller_mus.cc b/ash/mus/bridge/wm_root_window_controller_mus.cc
index d354a9e07337808ac82a44ce2f9a71a79cec3182..24b56eb3dc2a93bc2242c066e792598e02f812ce 100644
--- a/ash/mus/bridge/wm_root_window_controller_mus.cc
+++ b/ash/mus/bridge/wm_root_window_controller_mus.cc
@@ -12,6 +12,7 @@
 #include "ash/mus/bridge/wm_window_mus.h"
 #include "ash/mus/container_ids.h"
 #include "ash/mus/root_window_controller.h"
+#include "ash/mus/window_manager.h"
 #include "services/ui/public/cpp/window.h"
 #include "services/ui/public/cpp/window_property.h"
 #include "services/ui/public/cpp/window_tree_client.h"
@@ -135,6 +136,15 @@ WmWindow* WmRootWindowControllerMus::FindEventTarget(
   return nullptr;
 }
 
+gfx::Point WmRootWindowControllerMus::GetLastMouseLocationInRoot() {
+  gfx::Point location = root_window_controller_->window_manager()
+                            ->window_tree_client()
+                            ->GetCursorScreenPoint();
+  location -=
+      root_window_controller_->display().bounds().origin().OffsetFromOrigin();
+  return location;
+}
+
 void WmRootWindowControllerMus::AddObserver(
     WmRootWindowControllerObserver* observer) {
   observers_.AddObserver(observer);