Migrate all LayoutTests/dart/dom to main repo.

client/tests/client/dom/HistoryTest.dart

Index: client/tests/client/dom/HistoryTest.dart
diff --git a/client/tests/client/dom/HistoryTest.dart b/client/tests/client/dom/HistoryTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..33f60a306d3aad5950fa2d2efca05369a6ca3ae2
--- /dev/null
+++ b/client/tests/client/dom/HistoryTest.dart
@@ -0,0 +1,17 @@
+#library('HistoryTest');
+#import('../../../testing/unittest/unittest.dart');
+#import('dart:dom');
+
+main() {
+  forLayoutTests();
+  test('History', () {
+    window.history.pushState(null, document.title, '?foo=bar');
+    expect(window.history.length).equals(2);
+    window.history.back();
+    expect(window.location.href.endsWith('foo=bar')).isTrue();
+
+    window.history.replaceState(null, document.title, '?foo=baz');
+    Expect.equals(2, window.history.length);
+    expect(window.location.href.endsWith('foo=baz')).isTrue();
+  });
+}