Adjust ChromeVox (spoken feedback) strings and make it possible for announcemen

chrome/browser/chromeos/accessibility/accessibility_manager.h

Index: chrome/browser/chromeos/accessibility/accessibility_manager.h
diff --git a/chrome/browser/chromeos/accessibility/accessibility_manager.h b/chrome/browser/chromeos/accessibility/accessibility_manager.h
index c9ba50cff40fefea428b788c47435a8c1821346a..a0a7d1fdcdd4205fa4c660af80264e84c60d29b0 100644
--- a/chrome/browser/chromeos/accessibility/accessibility_manager.h
+++ b/chrome/browser/chromeos/accessibility/accessibility_manager.h
@@ -10,6 +10,8 @@
 #include "base/prefs/pref_change_registrar.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_util.h"
 #include "chrome/browser/extensions/api/braille_display_private/braille_controller.h"
+#include "chrome/browser/extensions/event_router.h"
+#include "chrome/browser/extensions/extension_system.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
@@ -36,6 +38,7 @@ struct AccessibilityStatusEventDetails {
 // watching profile notifications and pref-changes.
 // TODO(yoshiki): merge MagnificationManager with AccessibilityManager.
 class AccessibilityManager : public content::NotificationObserver,
+    public extensions::EventRouter::Observer,
     extensions::api::braille_display_private::BrailleObserver {
  public:
   // Creates an instance of AccessibilityManager, this should be called once,
@@ -156,6 +159,12 @@ class AccessibilityManager : public content::NotificationObserver,
       const extensions::api::braille_display_private::DisplayState&
           display_state) OVERRIDE;
 
+  // EventRouter::Observer implementation.
+  virtual void OnListenerAdded(
+      const extensions::EventListenerInfo& details) OVERRIDE;
+  virtual void OnListenerRemoved(
+      const extensions::EventListenerInfo& details) OVERRIDE;
+
   // Profile which has the current a11y context.
   Profile* profile_;
 
@@ -185,6 +194,8 @@ class AccessibilityManager : public content::NotificationObserver,
 
   base::WeakPtrFactory<AccessibilityManager> weak_ptr_factory_;
 
+  bool should_speak_chrome_vox_announcements_on_user_screen_;
+
   DISALLOW_COPY_AND_ASSIGN(AccessibilityManager);
 };