Explicitly show and hide accessible rings rather than using offscreen coords.

chrome/browser/chromeos/ui/accessibility_focus_ring_controller.h

Index: chrome/browser/chromeos/ui/accessibility_focus_ring_controller.h
diff --git a/chrome/browser/chromeos/ui/accessibility_focus_ring_controller.h b/chrome/browser/chromeos/ui/accessibility_focus_ring_controller.h
index 80feb5ce3a2bcaaf5d5d4780915f33f281a8e44f..a2049a63df60c08274b3b5a278be43082a47129a 100644
--- a/chrome/browser/chromeos/ui/accessibility_focus_ring_controller.h
+++ b/chrome/browser/chromeos/ui/accessibility_focus_ring_controller.h
@@ -31,12 +31,15 @@ class AccessibilityFocusRingController : public FocusRingLayerDelegate {
   // ring should persist or fade out.
   void SetFocusRing(const std::vector<gfx::Rect>& rects,
                     FocusRingBehavior focus_ring_behavior);
+  void HideFocusRing();
 
   // Draw a ring around the mouse cursor. It fades out automatically.
   void SetCursorRing(const gfx::Point& location);
+  void HideCursorRing();
 
   // Draw a ring around the text caret. It fades out automatically.
   void SetCaretRing(const gfx::Point& location);
+  void HideCaretRing();
 
   // Don't fade in / out, for testing.
   void SetNoFadeForTesting();