Toggle spoken feedback if two fingers are held down.

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index 96f7ad8c785dcd671193f528481026100f707216..ebb7170f893a516985213313baf04be421d1afd6 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -303,6 +303,11 @@ class AccessibilityDelegateImpl : public ash::AccessibilityDelegate {
     return ash::A11Y_ALERT_NONE;
   }
 
+  void PlaySpokenFeedbackToggleCountdown(int tick_count) override {
+    DCHECK(AccessibilityManager::Get());
+    AccessibilityManager::Get()->PlaySpokenFeedbackToggleCountdown(tick_count);
+  }
+
   void PlayEarcon(int sound_key) override {
     DCHECK(AccessibilityManager::Get());
     AccessibilityManager::Get()->PlayEarcon(