chromeos: enable MouseCursorEventFilter for mushrome

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index 8cdfec9c861977a5c88ca323d51d7546de3f1125..cd83c783234cc3f788ef4e95a66ccccac401baa8 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -620,10 +620,10 @@ Shell::~Shell() {
   RemovePreTargetHandler(event_transformation_handler_.get());
   RemovePreTargetHandler(toplevel_window_event_handler_.get());
   RemovePostTargetHandler(toplevel_window_event_handler_.get());
-  if (config != Config::MASH)
+  if (config != Config::MASH) {
     RemovePreTargetHandler(system_gesture_filter_.get());
-  if (config == Config::CLASSIC)
     RemovePreTargetHandler(mouse_cursor_filter_.get());
+  }
   RemovePreTargetHandler(modality_filter_.get());
 
   // TooltipController is deleted with the Shell so removing its references.
@@ -998,9 +998,9 @@ void Shell::Init(const ShellInitParams& init_params) {
   // process mouse events prior to screenshot session.
   // See http://crbug.com/459214
   screenshot_controller_.reset(new ScreenshotController());
-  // TODO: evaluate if MouseCursorEventFilter needs to work for mus/mash.
+  // TODO: evaluate if MouseCursorEventFilter needs to work for mash.
   // http://crbug.com/706474.
-  if (config == Config::CLASSIC) {
+  if (config != Config::MASH) {
     mouse_cursor_filter_.reset(new MouseCursorEventFilter());
     PrependPreTargetHandler(mouse_cursor_filter_.get());
   }