Forward accessibility events to the automation extension process.

chrome/common/extensions/chrome_extension_messages.h

Index: chrome/common/extensions/chrome_extension_messages.h
diff --git a/chrome/common/extensions/chrome_extension_messages.h b/chrome/common/extensions/chrome_extension_messages.h
index cbc5f2065e8ab9546840e7287bf2a19a699c3fa5..da46506564c945f7d0aec041d264ba215d2d6f9e 100644
--- a/chrome/common/extensions/chrome_extension_messages.h
+++ b/chrome/common/extensions/chrome_extension_messages.h
@@ -12,10 +12,14 @@
 
 #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
@@ -50,6 +54,28 @@ IPC_MESSAGE_ROUTED4(ExtensionMsg_InlineWebstoreInstallResponse,
                     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.