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

chrome/browser/chromeos/ui/accessibility_focus_ring_controller.cc

Index: chrome/browser/chromeos/ui/accessibility_focus_ring_controller.cc
diff --git a/chrome/browser/chromeos/ui/accessibility_focus_ring_controller.cc b/chrome/browser/chromeos/ui/accessibility_focus_ring_controller.cc
index f71c9c808eab08535be7b6137e8c55822f3531fa..6d042839f6e1c3aa1710ba22ff546856c5f06a61 100644
--- a/chrome/browser/chromeos/ui/accessibility_focus_ring_controller.cc
+++ b/chrome/browser/chromeos/ui/accessibility_focus_ring_controller.cc
@@ -88,6 +88,11 @@ void AccessibilityFocusRingController::SetFocusRing(
   UpdateFocusRingsFromFocusRects();
 }
 
+void AccessibilityFocusRingController::HideFocusRing() {
+  focus_rects_.clear();
+  UpdateFocusRingsFromFocusRects();
+}
+
 void AccessibilityFocusRingController::UpdateFocusRingsFromFocusRects() {
   previous_focus_rings_.swap(focus_rings_);
   focus_rings_.clear();
@@ -133,6 +138,10 @@ void AccessibilityFocusRingController::SetCursorRing(
   OnLayerChange(&cursor_animation_info_);
 }
 
+void AccessibilityFocusRingController::HideCursorRing() {
+  cursor_layer_.reset();
+}
+
 void AccessibilityFocusRingController::SetCaretRing(
     const gfx::Point& location) {
   caret_location_ = location;
@@ -146,6 +155,10 @@ void AccessibilityFocusRingController::SetCaretRing(
   OnLayerChange(&caret_animation_info_);
 }
 
+void AccessibilityFocusRingController::HideCaretRing() {
+  caret_layer_.reset();
+}
+
 void AccessibilityFocusRingController::SetNoFadeForTesting() {
   focus_animation_info_.fade_in_time = base::TimeDelta();
   focus_animation_info_.fade_out_time = base::TimeDelta::FromHours(1);