Converting Element.client*, offset* and Screen.avail* over to Rects

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

Index: tools/dom/templates/html/impl/impl_Screen.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_HTMLTableSectionElement.darttemplate b/tools/dom/templates/html/impl/impl_Screen.darttemplate
similarity index 56%
copy from tools/dom/templates/html/impl/impl_HTMLTableSectionElement.darttemplate
copy to tools/dom/templates/html/impl/impl_Screen.darttemplate
index cb5dd96fa2c0c877f79ce104c2a7509a3fe168ee..edcf0704cf36e99a1b152cccde68d1364e470cdf 100644
--- a/tools/dom/templates/html/impl/impl_HTMLTableSectionElement.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Screen.darttemplate
@@ -7,14 +7,10 @@ part of $LIBRARYNAME;
 @DocsEditable
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 
-  @DomName('HTMLTableSectionElement.rows')
-  List<TableRowElement> get rows =>
-    new _WrappedList<TableRowElement>($dom_rows);
-
-  TableRowElement addRow() {
-    return insertRow(-1);
-  }
-
-  TableRowElement insertRow(int index) => $dom_insertRow(index);
-
+  @DomName('Screen.availHeight')
+  @DomName('Screen.availLeft')
+  @DomName('Screen.availTop')
+  @DomName('Screen.availWidth')
+  Rect get available => new Rect($dom_availLeft, $dom_availTop, $dom_availWidth,
+      $dom_availHeight);
 $!MEMBERS}