Forward accessibility events to the automation extension process.

chrome/common/extensions/chrome_extension_messages.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.
 
 // Chrome-specific IPC messages for extensions.
 // Extension-related messages that aren't specific to Chrome live in
 // extensions/common/extension_messages.h.
 //
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 
 #include "base/strings/string16.h"
 #include "base/values.h"
+#include "chrome/common/extensions/api/automation_internal.h"
 #include "chrome/common/extensions/api/webstore/webstore_api_constants.h"
 #include "chrome/common/extensions/webstore_install_result.h"
 #include "extensions/common/stack_frame.h"
 #include "ipc/ipc_message_macros.h"
+#include "ui/accessibility/ax_enums.h"
+#include "ui/accessibility/ax_node_data.h"
+#include "ui/accessibility/ax_tree_update.h"
 #include "url/gurl.h"
 
 #define IPC_MESSAGE_START ChromeExtensionMsgStart
 
 IPC_ENUM_TRAITS_MAX_VALUE(extensions::api::webstore::InstallStage,
                           extensions::api::webstore::INSTALL_STAGE_INSTALLING)
 IPC_ENUM_TRAITS_MAX_VALUE(extensions::webstore_install::Result,
                           extensions::webstore_install::RESULT_LAST)
 
 // Messages sent from the browser to the renderer.
@@ skipping 14 matching lines @@
                     int /* percent_downloaded */)
 
 // Send to renderer once the installation mentioned on
 // ExtensionHostMsg_InlineWebstoreInstall is complete.
 IPC_MESSAGE_ROUTED4(ExtensionMsg_InlineWebstoreInstallResponse,
                     int32 /* install id */,
                     bool /* whether the install was successful */,
                     std::string /* error */,
                     extensions::webstore_install::Result /* result */)
 
+IPC_STRUCT_BEGIN(ExtensionMsg_AccessibilityEventParams)
+  // ID of the accessibility tree that this event applies to.
+  IPC_STRUCT_MEMBER(int, tree_id)
+
+  // The global offset of all coordinates in this accessibility tree.
+  IPC_STRUCT_MEMBER(gfx::Vector2d, location_offset)
+
+  // The tree update.
+  IPC_STRUCT_MEMBER(ui::AXTreeUpdate, update)
+
+  // 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()
+
+// Forward an accessibility message to an extension process where an
+// extension is using the automation API to listen for accessibility events.
+IPC_MESSAGE_ROUTED1(ExtensionMsg_AccessibilityEvent,
+                    ExtensionMsg_AccessibilityEventParams)
+
 // Messages sent from the renderer to the browser.
 
 
 // Sent by the renderer to implement chrome.webstore.install().
 IPC_MESSAGE_ROUTED5(ExtensionHostMsg_InlineWebstoreInstall,
                     int32 /* install id */,
                     int32 /* return route id */,
                     std::string /* Web Store item ID */,
                     GURL /* requestor URL */,
                     int /* listeners_mask */)