Pointer watcher modifications to support laser pointer.

ash/common/wm_shell.cc

Index: ash/common/wm_shell.cc
diff --git a/ash/common/wm_shell.cc b/ash/common/wm_shell.cc
index 6d629cb9fdf30883d2eb9d38b48f61a8cef6079c..4600eea835f4d4428efbeacd35cb880e8dc9fa6e 100644
--- a/ash/common/wm_shell.cc
+++ b/ash/common/wm_shell.cc
@@ -35,6 +35,7 @@
 #include "ui/app_list/presenter/app_list_presenter.h"
 #include "ui/display/display.h"
 #include "ui/views/focus/focus_manager_factory.h"
+#include "ui/wm/core/cursor_manager.h"
 
 #if defined(OS_CHROMEOS)
 #include "ash/common/system/chromeos/brightness/brightness_controller_chromeos.h"
@@ -273,4 +274,8 @@ void WmShell::SetAcceleratorController(
   accelerator_controller_ = std::move(accelerator_controller);
 }
 
+void WmShell::SetCursorManager(
+    std::unique_ptr<::wm::CursorManager> cursor_manager) {
+  cursor_manager_ = std::move(cursor_manager);
+}
 }  // namespace ash