Reports the position of the caret and current selection in content editables.

content/renderer/accessibility/blink_ax_tree_source.cc

Index: content/renderer/accessibility/blink_ax_tree_source.cc
diff --git a/content/renderer/accessibility/blink_ax_tree_source.cc b/content/renderer/accessibility/blink_ax_tree_source.cc
index addc5758f1655b49c81747ff6d97e20860f7c601..9d8d47e6f0f11804e07cd3f6e80ea35d082ed20d 100644
--- a/content/renderer/accessibility/blink_ax_tree_source.cc
+++ b/content/renderer/accessibility/blink_ax_tree_source.cc
@@ -480,17 +480,33 @@ void BlinkAXTreeSource::SerializeNode(blink::WebAXObject src,
     if (node_to_frame_routing_id_map_ && !src.equals(GetRoot())) {
       WebLocalFrame* frame = document.frame();
       RenderFrameImpl* render_frame = RenderFrameImpl::FromWebFrame(frame);
+      RenderFrameProxy* render_frame_proxy = nullptr;
+
       if (render_frame) {
         (*node_to_frame_routing_id_map_)[dst->id] =
             render_frame->GetRoutingID();
-        dst->AddBoolAttribute(ui::AX_ATTR_IS_AX_TREE_HOST, true);
       } else {
-        RenderFrameProxy* render_frame_proxy =
-            RenderFrameProxy::FromWebFrame(frame);
+         render_frame_proxy = RenderFrameProxy::FromWebFrame(frame);
         if (render_frame_proxy) {
           (*node_to_frame_routing_id_map_)[dst->id] =
               render_frame_proxy->routing_id();
-          dst->AddBoolAttribute(ui::AX_ATTR_IS_AX_TREE_HOST, true);
+        }
+      }
+
+      if (render_frame || render_frame_proxy) {
+        dst->AddBoolAttribute(ui::AX_ATTR_IS_AX_TREE_HOST, true);
+
+        WebAXObject anchorObject, focusObject;

[dmazzoni, 2015/07/16 19:50:23]

This code doesn't make sense here - it's in a block of code that specifically
excludes the root of the tree. I think you accidentally broke this when merging
because it changed recently.

+        int anchorOffset, focusOffset;
+        src.selection(anchorObject, anchorOffset, focusObject, focusOffset);
+        if (!anchorObject.isNull() && !focusObject.isNull() &&
+            anchorOffset >= 0 && focusOffset >= 0) {
+          int anchorId = anchorObject.axID();

[dmazzoni, 2015/07/16 19:50:23]

nit: anchor_id, etc.

+          int focusId = focusObject.axID();
+          dst->AddIntAttribute(ui::AX_ATTR_ANCHOR_OBJECT_ID, anchorId);
+          dst->AddIntAttribute(ui::AX_ATTR_ANCHOR_OFFSET, anchorOffset);
+          dst->AddIntAttribute(ui::AX_ATTR_FOCUS_OBJECT_ID, focusId);
+          dst->AddIntAttribute(ui::AX_ATTR_FOCUS_OFFSET, focusOffset);
         }
       }
     }