Implement large cursors in Mushrome.

services/ui/ws/platform_display.h

Index: services/ui/ws/platform_display.h
diff --git a/services/ui/ws/platform_display.h b/services/ui/ws/platform_display.h
index a33f6383cc5b9bb11796485f334ac9c730d74de6..fb567d733458e13f6c87e8c7b7ece173f0c65f42 100644
--- a/services/ui/ws/platform_display.h
+++ b/services/ui/ws/platform_display.h
@@ -18,6 +18,7 @@
 
 namespace ui {
 
+enum class CursorSize;
 struct TextInputState;
 
 namespace ws {
@@ -50,6 +51,8 @@ class PlatformDisplay : public ui::EventSource {
 
   virtual void MoveCursorTo(const gfx::Point& window_pixel_location) = 0;
 
+  virtual void SetCursorSize(const ui::CursorSize& cursor_size) = 0;
+
   virtual void UpdateTextInputState(const ui::TextInputState& state) = 0;
   virtual void SetImeVisibility(bool visible) = 0;