Generalize the HIT_TEST accessibility action so that it can send any event.

content/renderer/accessibility/render_accessibility_impl.cc

 // 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.
 
 #include "content/renderer/accessibility/render_accessibility_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <queue>
@@ skipping 453 matching lines @@
     case ui::AX_ACTION_DECREMENT:
       target.decrement();
       break;
     case ui::AX_ACTION_DO_DEFAULT:
       target.performDefaultAction();
       break;
     case ui::AX_ACTION_GET_IMAGE_DATA:
       OnGetImageData(target, data.target_rect.size());
       break;
     case ui::AX_ACTION_HIT_TEST:
-      OnHitTest(data.target_point);
+      DCHECK(data.hit_test_event_to_fire != ui::AX_EVENT_NONE);
+      OnHitTest(data.target_point, data.hit_test_event_to_fire);
       break;
     case ui::AX_ACTION_INCREMENT:
       target.increment();
       break;
     case ui::AX_ACTION_SCROLL_TO_MAKE_VISIBLE:
       target.scrollToMakeVisibleWithSubFocus(
           WebRect(data.target_rect.x(), data.target_rect.y(),
                   data.target_rect.width(), data.target_rect.height()));
       break;
     case ui::AX_ACTION_SCROLL_TO_POINT:
@@ skipping 43 matching lines @@
 
   DCHECK(ack_pending_);
   ack_pending_ = false;
   SendPendingAccessibilityEvents();
 }
 
 void RenderAccessibilityImpl::OnFatalError() {
   CHECK(false) << "Invalid accessibility tree.";
 }
 
-void RenderAccessibilityImpl::OnHitTest(const gfx::Point& point) {
+void RenderAccessibilityImpl::OnHitTest(const gfx::Point& point,
+                                        ui::AXEvent event_to_fire) {
   const WebDocument& document = GetMainDocument();
   if (document.isNull())
     return;
   WebAXObject root_obj = document.accessibilityObject();
   if (!root_obj.updateLayoutAndCheckValidity())
     return;
 
   WebAXObject obj = root_obj.hitTest(point);
   if (obj.isDetached())
     return;
 
   // If the object that was hit has a child frame, we have to send a
   // message back to the browser to do the hit test in the child frame,
   // recursively.
   AXContentNodeData data;
   ScopedFreezeBlinkAXTreeSource freeze(&tree_source_);
   tree_source_.SerializeNode(obj, &data);
   if (data.HasContentIntAttribute(AX_CONTENT_ATTR_CHILD_ROUTING_ID) ||
       data.HasContentIntAttribute(
           AX_CONTENT_ATTR_CHILD_BROWSER_PLUGIN_INSTANCE_ID)) {
-    Send(new AccessibilityHostMsg_ChildFrameHitTestResult(routing_id(), point,
-                                                          obj.axID()));
+    Send(new AccessibilityHostMsg_ChildFrameHitTestResult(
+        routing_id(), point, obj.axID(), event_to_fire));
     return;
   }
 
-  // Otherwise, send a HOVER event on the node that was hit.
-  HandleAXEvent(obj, ui::AX_EVENT_HOVER);
+  // Otherwise, send an event on the node that was hit.
+  HandleAXEvent(obj, event_to_fire);
 }
 
 void RenderAccessibilityImpl::OnSetAccessibilityFocus(
     const blink::WebAXObject& obj) {
   ScopedFreezeBlinkAXTreeSource freeze(&tree_source_);
   if (tree_source_.accessibility_focus_id() == obj.axID())
     return;
 
   tree_source_.set_accessibility_focus_id(obj.axID());
 
@@ skipping 90 matching lines @@
 
   const WebDocument& document = GetMainDocument();
   if (document.isNull())
     return;
 
   document.accessibilityObject().scrollToMakeVisibleWithSubFocus(
       WebRect(bounds.x(), bounds.y(), bounds.width(), bounds.height()));
 }
 
 }  // namespace content