Show ChromeVox caption panel when spoken feedback is enabled.

chrome/browser/chromeos/accessibility/accessibility_manager.cc

 // Copyright (c) 2013 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 "chrome/browser/chromeos/accessibility/accessibility_manager.h"
 
 #include "ash/audio/sounds.h"
 #include "ash/autoclick/autoclick_controller.h"
 #include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/metrics/user_metrics_recorder.h"
@@ skipping 359 matching lines @@
       high_contrast_enabled_(false),
       autoclick_enabled_(false),
       autoclick_delay_ms_(ash::AutoclickController::kDefaultAutoclickDelayMs),
       virtual_keyboard_enabled_(false),
       spoken_feedback_notification_(ui::A11Y_NOTIFICATION_NONE),
       should_speak_chrome_vox_announcements_on_user_screen_(true),
       system_sounds_enabled_(false),
       braille_display_connected_(false),
       scoped_braille_observer_(this),
       braille_ime_current_(false),
+      chromevox_panel_(nullptr),
       weak_ptr_factory_(this) {
   notification_registrar_.Add(this,
                               chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE,
                               content::NotificationService::AllSources());
   notification_registrar_.Add(this,
                               chrome::NOTIFICATION_SESSION_STARTED,
                               content::NotificationService::AllSources());
   notification_registrar_.Add(this,
                               chrome::NOTIFICATION_PROFILE_DESTROYED,
                               content::NotificationService::AllSources());
@@ skipping 239 matching lines @@
       chrome_vox_loaded_on_lock_screen_ = true;
       LoadChromeVoxExtension(
           profile,
           lock_web_ui->GetWebContents()->GetRenderViewHost(),
           done_cb);
     }
   }
 }
 
 void AccessibilityManager::UnloadChromeVox() {
+  if (chromevox_panel_) {
+    chromevox_panel_->Close();
+    chromevox_panel_ = nullptr;
+  }
+
   if (chrome_vox_loaded_on_lock_screen_)
     UnloadChromeVoxFromLockScreen();
 
   if (chrome_vox_loaded_on_user_screen_) {
     UnloadChromeVoxExtension(profile_);
     chrome_vox_loaded_on_user_screen_ = false;
   }
 
   PostUnloadChromeVox(profile_);
 }
@@ skipping 482 matching lines @@
         extensions::events::ACCESSIBILITY_PRIVATE_ON_INTRODUCE_CHROME_VOX,
         extensions::api::accessibility_private::OnIntroduceChromeVox::
             kEventName,
         event_args.Pass()));
     event_router->DispatchEventWithLazyListener(
         extension_misc::kChromeVoxExtensionId, event.Pass());
   }
 
   should_speak_chrome_vox_announcements_on_user_screen_ =
       chrome_vox_loaded_on_lock_screen_;
+
+  chromevox_panel_ = new ChromeVoxPanel(profile_);
 }
 
 void AccessibilityManager::PostUnloadChromeVox(Profile* profile) {
   // Do any teardown work needed immediately after ChromeVox actually unloads.
   ash::PlaySystemSoundAlways(SOUND_SPOKEN_FEEDBACK_DISABLED);
   // Clear the accessibility focus ring.
   AccessibilityFocusRingController::GetInstance()->SetFocusRing(
       std::vector<gfx::Rect>());
 }
 
+gfx::Insets AccessibilityManager::GetWorkAreaInsets(
+    aura::Window* root_window) const {
+  if (chromevox_panel_ && chromevox_panel_->GetRootWindow() == root_window)
+    return gfx::Insets(chromevox_panel_->GetHeight(), 0, 0, 0);
+  else
+    return gfx::Insets();
+}
+
 }  // namespace chromeos