Mark supportsPointConversions deprecated and always true rather than testing DOMPoint

tools/dom/templates/html/impl/impl_Window.darttemplate

Index: tools/dom/templates/html/impl/impl_Window.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Window.darttemplate b/tools/dom/templates/html/impl/impl_Window.darttemplate
index d891762e968cf8a5c55c2ad3f3a1b4ae2cef12aa..857f2730c64a88ae2e5d626d97ec2d79215bb182 100644
--- a/tools/dom/templates/html/impl/impl_Window.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Window.darttemplate
@@ -217,11 +217,9 @@ $endif
     return _requestFileSystem(persistent? 1 : 0, size);
   }
 
-  /**
-   * convertPointFromNodeToPage and convertPointFromPageToNode are removed.
-   * see http://dev.w3.org/csswg/cssom-view/#geometry
-   */
-  static bool get supportsPointConversions => DomPoint.supported;
+  /// Obsolete API for testing if Geometry APIs supported.
+  @Deprecated("Obsolete")
+  static bool get supportsPointConversions => true;
 $!MEMBERS
 
   /**