Rename "inputPre" to "mainEditorPane".

dart/tests/try/paste_content_rewriting_test.dart

Index: dart/tests/try/paste_content_rewriting_test.dart
diff --git a/dart/tests/try/paste_content_rewriting_test.dart b/dart/tests/try/paste_content_rewriting_test.dart
index e865233a19e8b2c6b4f05d3c6470b735f4793f40..6d12d967ae7f9ccc9c4be657c6cf906d116fa3ee 100644
--- a/dart/tests/try/paste_content_rewriting_test.dart
+++ b/dart/tests/try/paste_content_rewriting_test.dart
@@ -13,7 +13,7 @@ import '../../site/try/src/interaction_manager.dart' show
     InteractionManager;
 
 import '../../site/try/src/ui.dart' show
-    inputPre,
+    mainEditorPane,
     observer;
 
 import '../../site/try/src/user_option.dart' show
@@ -26,20 +26,20 @@ main() {
   UserOption.storage = {};
 
   var interaction = new InteractionManager();
-  inputPre = new DivElement();
-  document.body.append(inputPre);
+  mainEditorPane = new DivElement();
+  document.body.append(mainEditorPane);
   observer = new MutationObserver(interaction.onMutation)
-      ..observe(inputPre, childList: true, characterData: true, subtree: true);
+      ..observe(mainEditorPane, childList: true, characterData: true, subtree: true);
 
-  inputPre.innerHtml = "<span><p>//...</p>}</span>";
+  mainEditorPane.innerHtml = "<span><p>//...</p>}</span>";
 
   asyncTest(() => new Future(() {
     print('Welcome to the future');
-    Expect.stringEquals('//...\n}\n', inputPre.text);
+    Expect.stringEquals('//...\n}\n', mainEditorPane.text);
   }).then((_) {
-    inputPre.innerHtml = 'someText';
+    mainEditorPane.innerHtml = 'someText';
     return new Future(() {
-      Expect.stringEquals('someText\n', inputPre.text);
+      Expect.stringEquals('someText\n', mainEditorPane.text);
 
       // Clear the DOM to work around a bug in test.dart.
       document.body.nodes.clear();