Move some accessibility methods, enums and interfaces into the content/public API.

content/common/view_message_enums.h

 // Copyright (c) 2012 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 CONTENT_COMMON_VIEW_MESSAGES_ENUMS_H_
 #define CONTENT_COMMON_VIEW_MESSAGES_ENUMS_H_
 
 #include "ipc/ipc_message_macros.h"
 
 // Values that may be OR'd together to form the 'flags' parameter of a
@@ skipping 35 matching lines @@
     RESTORE,
 
     // Like RESTORE, except that the navigation contains POST data.
     RESTORE_WITH_POST,
 
     // Navigation type not categorized by the other types.
     NORMAL
   };
 };
 
-enum AccessibilityMode {
-  // WebKit accessibility is off and no accessibility information is
-  // sent from the renderer to the browser process.
-  AccessibilityModeOff,
-
-  // WebKit accessibility is on, but only limited information about
-  // editable text nodes is sent to the browser process. Useful for
-  // implementing limited UIA on tablets.
-  AccessibilityModeEditableTextOnly,
-
-  // WebKit accessibility is on, and the full accessibility tree is synced
-  // to the browser process. Useful for screen readers and magnifiers.
-  AccessibilityModeComplete,
-};
-
 #endif  // CONTENT_COMMON_VIEW_MESSAGES_ENUMS_H_