Move all the butter bar code to a separate class. Fix some style, method & variable names and simpl…

chrome/browser/resources/file_manager/main.html

Index: chrome/browser/resources/file_manager/main.html
diff --git a/chrome/browser/resources/file_manager/main.html b/chrome/browser/resources/file_manager/main.html
index b008f86f33832768b8d1b22978a77da90fe3afc0..d9d1329d4758cd23baeb5f5c12c33b3536a60c8f 100644
--- a/chrome/browser/resources/file_manager/main.html
+++ b/chrome/browser/resources/file_manager/main.html
@@ -71,6 +71,7 @@
       <script src="js/path_util.js"></script>
       <script src="js/util.js"></script>
       <script src="js/breadcrumbs_controller.js"></script>
+      <script src="js/butter_bar.js"></script>
       <script src="js/directory_contents.js"></script>
       <script src="js/directory_model.js"></script>
       <script src="js/file_copy_manager_wrapper.js"></script>
@@ -237,7 +238,7 @@
       </div>
       <button class=cancel i18n-content=CANCEL_LABEL>[CANCEL]</button>
     </div>
-    <div class="butter-bar before-show">
+    <div id="butter-bar" class="before-show">
       <div class="content">
         <div class="butter-message"></div>
         <div class="progress-bar hide-in-butter">