Show ChromeVox caption panel when spoken feedback is enabled.

chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc

 // Copyright 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/ui/ash/chrome_shell_delegate.h"
 
 #include "ash/accelerators/magnifier_key_scroller.h"
 #include "ash/accelerators/spoken_feedback_toggler.h"
 #include "ash/accessibility_delegate.h"
 #include "ash/wm/mru_window_tracker.h"
@@ skipping 189 matching lines @@
 
   void PlayEarcon(int sound_key) override {
     DCHECK(chromeos::AccessibilityManager::Get());
     return chromeos::AccessibilityManager::Get()->PlayEarcon(sound_key);
   }
 
   base::TimeDelta PlayShutdownSound() const override {
     return chromeos::AccessibilityManager::Get()->PlayShutdownSound();
   }
 
+  gfx::Insets GetWorkAreaInsets(aura::Window* root_window) const override {
+    return chromeos::AccessibilityManager::Get()->GetWorkAreaInsets(
+        root_window);
+  }
+
  private:
   DISALLOW_COPY_AND_ASSIGN(AccessibilityDelegateImpl);
 };
 
 }  // anonymous namespace
 
 bool ChromeShellDelegate::IsFirstRunAfterBoot() const {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       chromeos::switches::kFirstExecAfterBoot);
 }
@@ skipping 70 matching lines @@
 }
 
 void ChromeShellDelegate::PlatformInit() {
   registrar_.Add(this,
                  chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED,
                  content::NotificationService::AllSources());
   registrar_.Add(this,
                  chrome::NOTIFICATION_SESSION_STARTED,
                  content::NotificationService::AllSources());
 }