Implement large cursors in Mushrome.

services/ui/ws/platform_display_default.cc

Index: services/ui/ws/platform_display_default.cc
diff --git a/services/ui/ws/platform_display_default.cc b/services/ui/ws/platform_display_default.cc
index a807396a839e082de9169b3a8338b2315db00625..f26e1d02701c9d96a2c720bff872cdc0f029d282 100644
--- a/services/ui/ws/platform_display_default.cc
+++ b/services/ui/ws/platform_display_default.cc
@@ -144,6 +144,10 @@ void PlatformDisplayDefault::MoveCursorTo(
   platform_window_->MoveCursorTo(window_pixel_location);
 }
 
+void PlatformDisplayDefault::SetCursorSize(const ui::CursorSize& cursor_size) {
+  image_cursors_->SetCursorSize(cursor_size);
+}
+
 void PlatformDisplayDefault::UpdateTextInputState(
     const ui::TextInputState& state) {
   ui::PlatformImeController* ime = platform_window_->GetPlatformImeController();