Two Finger Tap

ash/ash_touch_exploration_manager_chromeos.cc

Index: ash/ash_touch_exploration_manager_chromeos.cc
diff --git a/ash/ash_touch_exploration_manager_chromeos.cc b/ash/ash_touch_exploration_manager_chromeos.cc
index f5e212b9525c6ec55b9f291c1ad3a52a6d438d42..7bcd4c416558c2d0afa19c14441dd08cbe3ced80 100644
--- a/ash/ash_touch_exploration_manager_chromeos.cc
+++ b/ash/ash_touch_exploration_manager_chromeos.cc
@@ -4,12 +4,14 @@
 
 #include "ash/ash_touch_exploration_manager_chromeos.h"
 
+#include "ash/accelerators/accelerator_controller.h"
 #include "ash/accessibility_delegate.h"
 #include "ash/audio/sounds.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "base/command_line.h"
+#include "base/metrics/user_metrics.h"
 #include "chromeos/audio/chromeos_sounds.h"
 #include "chromeos/audio/cras_audio_handler.h"
 #include "chromeos/chromeos_switches.h"
@@ -57,6 +59,14 @@ void AshTouchExplorationManager::SetOutputLevel(int volume) {
     audio_handler_->SetOutputMute(true);
 }
 
+void AshTouchExplorationManager::SilenceSpokenFeedback() {

[lisayin, 2014/07/31 16:33:50]

This is the code that accelerator_controller uses to silence spoken feedback.
I'm not sure why this only pauses spoken feedback. However, I did notice that
when spoken feedback was silenced natively using control, it had the same issues
where it only paused it and skipped over a few words before continuing spoken
feedback.

+  AccessibilityDelegate* delegate =
+    Shell::GetInstance()->accessibility_delegate();
+  if (!delegate->IsSpokenFeedbackEnabled())
+    return;
+  delegate->SilenceSpokenFeedback();
+}
+
 void AshTouchExplorationManager::UpdateTouchExplorationState() {
   AccessibilityDelegate* delegate =
       Shell::GetInstance()->accessibility_delegate();