Two Finger Tap

ash/ash_touch_exploration_manager_chromeos.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/ash_touch_exploration_manager_chromeos.h"
 
 #include "ash/accessibility_delegate.h"
 #include "ash/audio/sounds.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
@@ skipping 39 matching lines @@
     if (audio_handler_->IsOutputMuted()) {
       audio_handler_->SetOutputMute(false);
     }
   }
   audio_handler_->SetOutputVolumePercent(volume);
   // Avoid negative volume.
   if (audio_handler_->IsOutputVolumeBelowDefaultMuteLevel())
     audio_handler_->SetOutputMute(true);
 }
 
+void AshTouchExplorationManager::SilenceSpokenFeedback() {
+  AccessibilityDelegate* delegate =
+    Shell::GetInstance()->accessibility_delegate();
+  if (!delegate->IsSpokenFeedbackEnabled())
+    return;
+  delegate->SilenceSpokenFeedback();
+}
+
 void AshTouchExplorationManager::UpdateTouchExplorationState() {
   AccessibilityDelegate* delegate =
       Shell::GetInstance()->accessibility_delegate();
   bool enabled = delegate->IsSpokenFeedbackEnabled();
 
   if (enabled && !touch_exploration_controller_.get()) {
     touch_exploration_controller_.reset(new ui::TouchExplorationController(
         root_window_controller_->GetRootWindow(), this));
   } else if (!enabled) {
     touch_exploration_controller_.reset();
   }
 }
 
 bool AshTouchExplorationManager::VolumeAdjustSoundEnabled() {
   return !CommandLine::ForCurrentProcess()->HasSwitch(
       chromeos::switches::kDisableVolumeAdjustSound);
 }
 
 }  // namespace ash