Add an accessibility mode for editable text fields only.

content/common/accessibility_messages.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.
 
 // IPC messages for accessibility.
 // Multiply-included message file, hence no include guard.
 
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
+#include "content/common/view_message_enums.h"
 #include "content/public/common/common_param_traits.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_message_utils.h"
 #include "ipc/ipc_param_traits.h"
 #include "ipc/param_traits_macros.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebPoint.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
 #include "webkit/glue/webaccessibility.h"
 
 #undef IPC_MESSAGE_EXPORT
@@ skipping 61 matching lines @@
 
   // Text was removed in a node with text content.
   AccessibilityNotificationTextRemoved,
 
   // The node value has changed.
   AccessibilityNotificationValueChangedD,
 };
 
 #endif  // CONTENT_COMMON_ACCESSIBILITY_MESSAGES_H_
 
+IPC_ENUM_TRAITS(AccessibilityMode)
 IPC_ENUM_TRAITS(AccessibilityNotification)
 
 IPC_ENUM_TRAITS(webkit_glue::WebAccessibility::BoolAttribute)
 IPC_ENUM_TRAITS(webkit_glue::WebAccessibility::FloatAttribute)
 IPC_ENUM_TRAITS(webkit_glue::WebAccessibility::IntAttribute)
 IPC_ENUM_TRAITS(webkit_glue::WebAccessibility::Role)
 IPC_ENUM_TRAITS(webkit_glue::WebAccessibility::State)
 IPC_ENUM_TRAITS(webkit_glue::WebAccessibility::StringAttribute)
 
 IPC_STRUCT_TRAITS_BEGIN(webkit_glue::WebAccessibility)
@@ skipping 25 matching lines @@
   // The accessibility node tree.
   IPC_STRUCT_MEMBER(webkit_glue::WebAccessibility, acc_tree)
 
   // Whether children are included in this tree, otherwise it's just an
   // update to this one node and existing children are left in place.
   IPC_STRUCT_MEMBER(bool, includes_children)
 IPC_STRUCT_END()
 
 // Messages sent from the browser to the renderer.
 
-// Enable accessibility in the renderer process.
-IPC_MESSAGE_ROUTED0(AccessibilityMsg_Enable)
+// Change the accessibility mode in the renderer process.
+IPC_MESSAGE_ROUTED1(AccessibilityMsg_SetMode,
+                    AccessibilityMode)
 
 // Relay a request from assistive technology to set focus to a given node.
 IPC_MESSAGE_ROUTED1(AccessibilityMsg_SetFocus,
                     int /* object id */)
 
 // Relay a request from assistive technology to perform the default action
 // on a given node.
 IPC_MESSAGE_ROUTED1(AccessibilityMsg_DoDefaultAction,
                     int /* object id */)
 
@@ skipping 24 matching lines @@
 // message was processed and it can send addition notifications.
 IPC_MESSAGE_ROUTED0(AccessibilityMsg_Notifications_ACK)
 
 // Messages sent from the renderer to the browser.
 
 // Sent to notify the browser about renderer accessibility notifications.
 // The browser responds with a AccessibilityMsg_Notifications_ACK.
 IPC_MESSAGE_ROUTED1(
     AccessibilityHostMsg_Notifications,
     std::vector<AccessibilityHostMsg_NotificationParams>)