Expose caps lock state as an accessible alert

ash/common/system/chromeos/tray_caps_lock.cc

Index: ash/common/system/chromeos/tray_caps_lock.cc
diff --git a/ash/common/system/chromeos/tray_caps_lock.cc b/ash/common/system/chromeos/tray_caps_lock.cc
index 003b9dd7372b947f8122ac37836c4e8d2d9f71fb..86f846d36292a27cfbf330b68b48449b9e94b589 100644
--- a/ash/common/system/chromeos/tray_caps_lock.cc
+++ b/ash/common/system/chromeos/tray_caps_lock.cc
@@ -4,6 +4,7 @@
 
 #include "ash/common/system/chromeos/tray_caps_lock.h"
 
+#include "ash/common/accessibility_delegate.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/system/tray/actionable_view.h"
 #include "ash/common/system/tray/fixed_sized_image_view.h"
@@ -161,6 +162,15 @@ TrayCapsLock::~TrayCapsLock() {
 void TrayCapsLock::OnCapsLockChanged(bool enabled) {
   caps_lock_enabled_ = enabled;
 
+  // Send an a11y alert.
+  if (enabled) {
+    WmShell::Get()->accessibility_delegate()->TriggerAccessibilityAlert(
+        A11Y_ALERT_CAPS_ON);
+  } else {
+    WmShell::Get()->accessibility_delegate()->TriggerAccessibilityAlert(
+        A11Y_ALERT_CAPS_OFF);

[oshima, 2016/11/10 22:41:40]

nit:

WmShell::Get()->acces..->TriggerAccessibilityAlert(
     enabled ? A11Y_ALERT_CAPS_ON : A11Y_ALERT_CAPS_OFF);

[David Tseng, 2016/11/10 23:46:04]

Done.

+  }
+
   if (tray_view())
     tray_view()->SetVisible(caps_lock_enabled_);