[Ozone] Fix SingleOnTop issue by checking if the quad is clipped.

ui/ozone/public/overlay_candidates_ozone.h

Index: ui/ozone/public/overlay_candidates_ozone.h
diff --git a/ui/ozone/public/overlay_candidates_ozone.h b/ui/ozone/public/overlay_candidates_ozone.h
index 23db7916d4d5cc9e52b0cfcd4561a9a6d124bc22..5733e936da1db1842dfdfd4d7eb76732abe3a8ed 100644
--- a/ui/ozone/public/overlay_candidates_ozone.h
+++ b/ui/ozone/public/overlay_candidates_ozone.h
@@ -35,10 +35,15 @@ class OZONE_BASE_EXPORT OverlayCandidatesOzone {
     gfx::RectF display_rect;
     // Crop within the buffer to be placed inside |display_rect|.
     gfx::RectF crop_rect;
+    // Quad geometry rect after applying the quad_transform().
+    gfx::RectF geometry_rect;

[danakj, 2015/08/31 22:11:47]

Rect also

[william.xie1, 2015/09/01 03:40:34]

Done.

+    // Clip rect in the target content space after composition.
+    gfx::Rect clip_rect;
+    // If the quad is clipped after composition.
+    bool is_clipped;
     // Stacking order of the overlay plane relative to the main surface,
     // which is 0. Signed to allow for "underlays".
     int plane_z_order = 0;
-
     // To be modified by the implementer if this candidate can go into
     // an overlay.
     bool overlay_handled = false;