Fix "unused variable" warnings.

chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.h

 // Copyright 2014 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_GUEST_VIEW_WEB_VIEW_CHROME_WEB_VIEW_GUEST_DELEGATE_H_
 #define CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_CHROME_WEB_VIEW_GUEST_DELEGATE_H_
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/browser/extensions/api/web_view/chrome_web_view_internal_api.h"
@@ skipping 41 matching lines @@
 #if defined(OS_CHROMEOS)
   // Notification of a change in the state of an accessibility setting.
   void OnAccessibilityStatusChanged(
       const chromeos::AccessibilityStatusEventDetails& details);
 #endif
 
   // A counter to generate a unique request id for a context menu request.
   // We only need the ids to be unique for a given WebViewGuest.
   int pending_context_menu_request_id_;
 
-  // Set to |true| if ChromeVox was already injected in main frame.
-  bool chromevox_injected_;
-
   // Holds the RenderViewContextMenuBase that has been built but yet to be
   // shown. This is .reset() after ShowContextMenu().
   std::unique_ptr<RenderViewContextMenuBase> pending_menu_;
 
 #if defined(OS_CHROMEOS)
+  // Set to |true| if ChromeVox was already injected in main frame.
+  bool chromevox_injected_ = false;
+
   // Subscription to receive notifications on changes to a11y settings.
   std::unique_ptr<chromeos::AccessibilityStatusSubscription>
       accessibility_subscription_;
 #endif
 
   WebViewGuest* const web_view_guest_;
 
   std::unique_ptr<gfx::Point> context_menu_position_;
 
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<ChromeWebViewGuestDelegate> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeWebViewGuestDelegate);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_CHROME_WEB_VIEW_GUEST_DELEGATE_H_