Cross-process iframe accessibility.

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"
@@ skipping 33 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(intlist_attributes)
   IPC_STRUCT_TRAITS_MEMBER(html_attributes)
   IPC_STRUCT_TRAITS_MEMBER(child_ids)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(ui::AXTreeUpdate)
   IPC_STRUCT_TRAITS_MEMBER(node_id_to_clear)
   IPC_STRUCT_TRAITS_MEMBER(nodes)
 IPC_STRUCT_TRAITS_END()
 
+typedef std::map<int32, int> FrameIDMap;
+
 IPC_STRUCT_BEGIN(AccessibilityHostMsg_EventParams)
   // The tree update.
   IPC_STRUCT_MEMBER(ui::AXTreeUpdate, update)
 
+  // Mapping from node id to routing id of its child frame - either the
+  // routing id of a RenderFrame or a RenderFrameProxy for an out-of-process
+  // iframe.
+  IPC_STRUCT_MEMBER(FrameIDMap, node_to_frame_routing_id_map)
+
   // Type of event.
   IPC_STRUCT_MEMBER(ui::AXEvent, event_type)
 
   // ID of the node that the event applies to.
   IPC_STRUCT_MEMBER(int, id)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(AccessibilityHostMsg_LocationChangeParams)
   // ID of the object whose location is changing.
   IPC_STRUCT_MEMBER(int, id)
@@ skipping 54 matching lines @@
 // Sent to notify the browser about renderer accessibility events.
 // The browser responds with a AccessibilityMsg_Events_ACK.
 IPC_MESSAGE_ROUTED1(
     AccessibilityHostMsg_Events,
     std::vector<AccessibilityHostMsg_EventParams>)
 
 // Sent to update the browser of the location of accessibility objects.
 IPC_MESSAGE_ROUTED1(
     AccessibilityHostMsg_LocationChanges,
     std::vector<AccessibilityHostMsg_LocationChangeParams>)