[orca] Move the Chromium script's descendantAtPoint to the web script

[Joanmarie Diggs <joanied src gnome org>]

commit 4b20f38440e85d424d5bd072b20515254432ff7d
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue May 19 20:06:50 2020 -0400

    Move the Chromium script's descendantAtPoint to the web script
    
    Mozilla and Chromium now both make it possible to get the deepest
    descendant at the specified point when the document is root. Yay!

 src/orca/scripts/toolkits/Chromium/script_utilities.py | 15 ---------------
 src/orca/scripts/web/script_utilities.py               | 15 +++++++++++++++
 2 files changed, 15 insertions(+), 15 deletions(-)
---
diff --git a/src/orca/scripts/toolkits/Chromium/script_utilities.py 
b/src/orca/scripts/toolkits/Chromium/script_utilities.py
index 50140f655..02bead6b7 100644
--- a/src/orca/scripts/toolkits/Chromium/script_utilities.py
+++ b/src/orca/scripts/toolkits/Chromium/script_utilities.py
@@ -520,21 +520,6 @@ class Utilities(web.Utilities):
         result = super().accessibleAtPoint(root, x, y, coordType)
         return result
 
-    def descendantAtPoint(self, root, x, y, coordType=None):
-        if coordType is None:
-            coordType = pyatspi.DESKTOP_COORDS
-
-        result = None
-        if self.isDocument(root):
-            result = self.accessibleAtPoint(root, x, y, coordType)
-
-        root = result or root
-        result = super().descendantAtPoint(root, x, y, coordType)
-        if self.isListItemMarker(result) or self.isStaticTextLeaf(result):
-            return result.parent
-
-        return result
-
     def _isActiveAndShowingAndNotIconified(self, obj):
         if super()._isActiveAndShowingAndNotIconified(obj):
             return True
diff --git a/src/orca/scripts/web/script_utilities.py b/src/orca/scripts/web/script_utilities.py
index b6012688b..c4f2d3c6b 100644
--- a/src/orca/scripts/web/script_utilities.py
+++ b/src/orca/scripts/web/script_utilities.py
@@ -823,6 +823,21 @@ class Utilities(script_utilities.Utilities):
 
         return [ext.x, ext.y, ext.width, ext.height]
 
+    def descendantAtPoint(self, root, x, y, coordType=None):
+        if coordType is None:
+            coordType = pyatspi.DESKTOP_COORDS
+
+        result = None
+        if self.isDocument(root):
+            result = self.accessibleAtPoint(root, x, y, coordType)
+
+        root = result or root
+        result = super().descendantAtPoint(root, x, y, coordType)
+        if self.isListItemMarker(result) or self.isStaticTextLeaf(result):
+            return result.parent
+
+        return result
+
     def _preserveTree(self, obj):
         if not (obj and obj.childCount):
             return False