Show ChromeVox caption panel when spoken feedback is enabled.

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 c961b205611a6156155f7457dcdc20efd3e7426a..ffbcccba85dbdc6cfdd64d2d9f2faa7b8790078f 100644
--- a/chrome/browser/chromeos/accessibility/accessibility_manager.h
+++ b/chrome/browser/chromeos/accessibility/accessibility_manager.h
@@ -16,6 +16,7 @@
 #include "base/scoped_observer.h"
 #include "base/time/time.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_util.h"
+#include "chrome/browser/chromeos/accessibility/chromevox_panel.h"
 #include "chrome/browser/extensions/api/braille_display_private/braille_controller.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -68,6 +69,8 @@ typedef base::CallbackList<void(const AccessibilityStatusEventDetails&)>
 typedef AccessibilityStatusCallbackList::Subscription
     AccessibilityStatusSubscription;
 
+class ChromeVoxPanelWidgetObserver;
+
 // AccessibilityManager changes the statuses of accessibility features
 // watching profile notifications and pref-changes.
 // TODO(yoshiki): merge MagnificationManager with AccessibilityManager.
@@ -200,6 +203,13 @@ class AccessibilityManager
   // chromeos/audio/chromeos_sounds.h.
   void PlayEarcon(int sound_key);
 
+  // Get work area insets due to accessibility overlays on one of the
+  // screen edges.
+  gfx::Insets GetWorkAreaInsets(aura::Window* root_window) const;
+
+  // Called by our widget observer when the ChromeVoxPanel is closing.
+  void OnChromeVoxPanelClosing();
+
   // Profile having the a11y context.
   Profile* profile() { return profile_; }
 
@@ -293,6 +303,9 @@ class AccessibilityManager
 
   bool braille_ime_current_;
 
+  ChromeVoxPanel* chromevox_panel_;
+  ChromeVoxPanelWidgetObserver* chromevox_panel_widget_observer_;
+
   base::WeakPtrFactory<AccessibilityManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AccessibilityManager);