Implement Android accessible hit testing using an IPC to the renderer process.

content/test/accessibility_browser_test_utils.h

 // Copyright 2013 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_TEST_ACCESSIBILITY_BROWSER_TEST_UTILS_H_
 #define CONTENT_TEST_ACCESSIBILITY_BROWSER_TEST_UTILS_H_
 
 #include "base/memory/weak_ptr.h"
 #include "content/common/view_message_enums.h"
 #include "ui/accessibility/ax_node_data.h"
@@ skipping 22 matching lines @@
 
   // Blocks until the specific accessibility notification registered in
   // AccessibilityNotificationWaiter is received. Ignores notifications for
   // "about:blank".
   void WaitForNotification();
 
   // After WaitForNotification has returned, this will retrieve
   // the tree of accessibility nodes received from the renderer process.
   const ui::AXTree& GetAXTree() const;
 
+  // After WaitForNotification returns, use this to retrieve the id of the
+  // node that was the target of the event.
+  int event_target_id() { return event_target_id_; }
+
  private:
   // Callback from RenderViewHostImpl.
-  void OnAccessibilityEvent(ui::AXEvent event);
+  void OnAccessibilityEvent(ui::AXEvent event, int event_target_id);
 
   // Helper function to determine if the accessibility tree in
   // GetAXTree() is about the page with the url "about:blank".
   bool IsAboutBlank();
 
   Shell* shell_;
   RenderViewHostImpl* view_host_;
   ui::AXEvent event_to_wait_for_;
   scoped_refptr<MessageLoopRunner> loop_runner_;
   base::WeakPtrFactory<AccessibilityNotificationWaiter> weak_factory_;
+  int event_target_id_;
 
   DISALLOW_COPY_AND_ASSIGN(AccessibilityNotificationWaiter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_ACCESSIBILITY_BROWSER_TEST_UTILS_H_