Fix issues that broke editing on browsers without Shadow DOM support.

dart/tests/try/cursor_position_test.dart

Index: dart/tests/try/cursor_position_test.dart
diff --git a/dart/tests/try/cursor_position_test.dart b/dart/tests/try/cursor_position_test.dart
index 1691b72046f44f16af49818959f4717d3501ec97..52ccb03d1a48340d8968c2dbb50b18a0ac5a5d41 100644
--- a/dart/tests/try/cursor_position_test.dart
+++ b/dart/tests/try/cursor_position_test.dart
@@ -49,14 +49,14 @@ void main() {
     new TestCase('Clear and presetup the test', () {
       clearEditorPaneWithoutNotifications();
       mainEditorPane.text = 'var greeting = "Hello, World!\n";';
-    }, () { 
-      checkLineCount(2); 
+    }, () {
+      checkLineCount(2);
     }),
-    
+
     new TestCase('Test removing a split line', () {
       mainEditorPane.nodes.first.nodes.last.remove();
-    }, () { 
-      checkLineCount(1); 
+    }, () {
+      checkLineCount(1);
     }),
   ]);
 }