Remove dependency on NotificationService for cros a11y settings.

chrome/browser/guestview/webview/webview_guest.h

 // 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.
 
 #ifndef CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_
 #define CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_
 
 #include "base/observer_list.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/guestview/guestview.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_observer.h"
 
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
+#endif
+
 namespace extensions {
 class ScriptExecutor;
 }  // namespace extensions
 
 // A WebViewGuest is a WebContentsObserver on the guest WebContents of a
 // <webview> tag. It provides the browser-side implementation of the <webview>
 // API and manages the lifetime of <webview> extension events. WebViewGuest is
 // created on attachment. That is, when a guest WebContents is associated with
 // a particular embedder WebContents. This happens on either initial navigation
 // or through the use of the New Window API, when a new window is attached to
@@ skipping 157 matching lines @@
 
   // Called when a redirect notification occurs.
   void LoadRedirect(const GURL& old_url,
                     const GURL& new_url,
                     bool is_top_level);
 
   void AddWebViewToExtensionRendererState();
   static void RemoveWebViewFromExtensionRendererState(
       content::WebContents* web_contents);
 
+#if defined(OS_CHROMEOS)
+  // Notification of a change in the state of an accessibility setting.
+  void OnAccessibilityStatusChanged(
+    const chromeos::AccessibilityStatusEventDetails& details);
+#endif
+
   void InjectChromeVoxIfNeeded(content::RenderViewHost* render_view_host);
 
   ObserverList<extensions::TabHelper::ScriptExecutionObserver>
       script_observers_;
   scoped_ptr<extensions::ScriptExecutor> script_executor_;
 
   content::NotificationRegistrar notification_registrar_;
 
   // A counter to generate a unique request id for a permission request.
   // We only need the ids to be unique for a given WebViewGuest.
@@ skipping 11 matching lines @@
 
   // Main frame ID of last committed page.
   int64 main_frame_id_;
 
   // Set to |true| if ChromeVox was already injected in main frame.
   bool chromevox_injected_;
 
   // Stores the current zoom factor.
   double current_zoom_factor_;
 
+#if defined(OS_CHROMEOS)
+  // Subscription to receive notifications on changes to a11y settings.
+  scoped_ptr<chromeos::AccessibilityStatusSubscription>
+      accessibility_subscription_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(WebViewGuest);
 };
 
 #endif  // CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_