[FileBrowser] Added DefaultAction dialog to choose default action.

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 2d8afc3875a18003a139289ea8dad714e5358fc1..14e1df8cd28192899e7dbc252e227439c55e6565 100644
--- a/chrome/browser/resources/file_manager/main.html
+++ b/chrome/browser/resources/file_manager/main.html
@@ -76,6 +76,7 @@
       <script src="js/file_type.js"></script>
       <script src="js/metadata/metadata_provider.js"></script>
       <script src="js/metadata/metadata_cache.js"></script>
+      <script src="js/default_action_dialog.js"></script>
       <!-- For accurate load performance tracking main.js should be
            the last script to include. -->
       <script src="js/main.js"></script>
@@ -123,6 +124,9 @@
           i18n-content=GDATA_SHOW_HOSTED_FILES_OPTION></menuitem>
     </menu>
 
+    <menu id="tasks-menu" class="chrome-menu">
+    </menu>
+
     <div class=dialog-title invisibleif='full-page'>[TITLE]</div>
     <div class=dialog-container>
       <div class=dialog-sidebar>
@@ -151,7 +155,7 @@
             </div>
             <button class="menubutton" id="gdata-settings"
                     menu="#docs-settings" visibleif="full-page">
-              <img src="images/settings.svg" alt="Settings">
+              <img src="images/settings.svg">
               <span class="disclosureindicator"></span>
             </button>
           </div>
@@ -178,7 +182,8 @@
             </div>
             <div class=preview-summary></div>
             <div class="right buttonbar" visibleif="full-page">
-              <button id="tasks" class="combobutton"></button>
+              <button id="tasks" class="combobutton" menu="#tasks-menu">
+              </button>
               <button id="delete-button" command="#delete"
                       i18n-content="DELETE_BUTTON_LABEL">
               </button>