Disable offset test until it is reproducible across machines.

tests/html/element_test.dart

Index: tests/html/element_test.dart
diff --git a/tests/html/element_test.dart b/tests/html/element_test.dart
index a26d7c73cccad589eda42b769468cda7d399c92a..c360c8fb48b1f1fd85437a176ea9ba962e46409b 100644
--- a/tests/html/element_test.dart
+++ b/tests/html/element_test.dart
@@ -797,7 +797,8 @@ main() {
       var quux = query('.quux');
 
       var point = itema.offsetTo(itemii);
-      expect(point.x, 40);
+      // TODO(efortuna): Make cross-machine reproducible.
+      /*expect(point.x, 40);
       expect(point.y, inInclusiveRange(17, 20));
 
       expect(baz.offsetTo(bar).x, 7000);
@@ -815,7 +816,7 @@ main() {
       expect(point.y, inInclusiveRange(54, 60));
       point = item1.offsetTo(itemii);
       expect(point.x, 230);
-      expect(point.y, inInclusiveRange(74, 80));
+      expect(point.y, inInclusiveRange(74, 80));*/
     });
 
     test('documentOffset', () {
@@ -828,7 +829,8 @@ main() {
       var item1 = query('.item-1');
       var itemii = query('.item-ii');
 
-      expect(itema.documentOffset.x, 88);
+      // TODO(efortuna): Make cross-machine reproducible.
+      /*expect(itema.documentOffset.x, 88);
       expect(itema.documentOffset.y, inInclusiveRange(119, 160));
 
       expect(itemii.documentOffset.x, 48);
@@ -850,7 +852,7 @@ main() {
       expect(qux.documentOffset.y, inInclusiveRange(221, 232));
 
       expect(quux.documentOffset.x, 8);
-      expect(quux.documentOffset.y, inInclusiveRange(221, 232));
+      expect(quux.documentOffset.y, inInclusiveRange(221, 232));*/
     });
   });