[aura-mus] Add ui::CursorData, with mojo serialization.

services/ui/public/interfaces/cursor/cursor.mojom

Index: services/ui/public/interfaces/cursor/cursor.mojom
diff --git a/services/ui/public/interfaces/cursor.mojom b/services/ui/public/interfaces/cursor/cursor.mojom
similarity index 65%
rename from services/ui/public/interfaces/cursor.mojom
rename to services/ui/public/interfaces/cursor/cursor.mojom
index 0fd34e184b8f92d3f6b65683085ae75e686cd586..08a88021df705ea96a9c706fe1ff27672e2add4e 100644
--- a/services/ui/public/interfaces/cursor.mojom
+++ b/services/ui/public/interfaces/cursor/cursor.mojom
@@ -4,6 +4,10 @@
 
 module ui.mojom;
 
+import "mojo/common/time.mojom";
+import "skia/public/interfaces/bitmap_array.mojom";
+import "ui/gfx/geometry/mojo/geometry.mojom";
+
 // Standard Cursor numbers. These are the same as Chrome's ui::Cursor and
 // blink's WebCursorInfo.
 enum CursorType {
@@ -55,3 +59,21 @@ enum CursorType {
   GRABBING,
   CUSTOM
 };
+
+// A description of a cursor.
+struct CursorData {
+  // The type of cursor. If CUSTOM, the rest of the fields are relevant.
+  CursorType cursor_type;
+
+  // The delay between cursor frames.
+  mojo.common.mojom.TimeDelta frame_delay;
+
+  // The hotspot in pixels in the source cursor frames.
+  gfx.mojom.Point hotspot_in_pixels;
+
+  // The frames of the cursor.
+  skia.mojom.BitmapArray cursor_frames;
+
+  // This is the image scale of this cursor.
+  float scale_factor;
+};