Enable touch exploration with screen reader.

Bug: b/73383411
Test: TBD
Change-Id: If9218005c2925ea66b67164435c552965d09b554
Reviewed-on: https://chromium-review.googlesource.com/1110944Reviewed-by: Alex Sakhartchouk <alexst@chromium.org>
Reviewed-by: Kevin Schoedel <kpschoedel@chromium.org>
Commit-Queue: Kevin Schoedel <kpschoedel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569631}

chromecast/browser/accessibility/accessibility_manager.cc

@@ -65,6 +65,10 @@ void AccessibilityManager::HideHighlights() {
   accessibility_focus_ring_controller_->HideHighlights();
 }
 
+void AccessibilityManager::EnableTouchExploration(bool enable) {
+  touch_exploration_manager_->Enable(enable);
+}
+
 void AccessibilityManager::SetTouchAccessibilityAnchorPoint(
     const gfx::Point& anchor_point) {
   touch_exploration_manager_->SetTouchAccessibilityAnchorPoint(anchor_point);

chromecast/browser/accessibility/accessibility_manager.h

@@ -53,6 +53,9 @@ class AccessibilityManager {
   // Hides highlight on screen.
   void HideHighlights();
 
+  // Enable or disable touch exploration.
+  void EnableTouchExploration(bool enable);
+
   // Update the touch exploration controller so that synthesized
   // touch events are anchored at this point.
   void SetTouchAccessibilityAnchorPoint(const gfx::Point& anchor_point);