File manager: support for zipping selected files.

chrome/browser/resources/file_manager/js/file_manager_commands.js

Index: chrome/browser/resources/file_manager/js/file_manager_commands.js
diff --git a/chrome/browser/resources/file_manager/js/file_manager_commands.js b/chrome/browser/resources/file_manager/js/file_manager_commands.js
index b273284590724387d455ce88efb4e9d1113493ca..082f7c1acd1dd26a0d8ca079ae0d208258b18436 100644
--- a/chrome/browser/resources/file_manager/js/file_manager_commands.js
+++ b/chrome/browser/resources/file_manager/js/file_manager_commands.js
@@ -279,3 +279,20 @@ Commands.openWithCommand = {
     event.canExecute = tasks && tasks.size() > 1;
   }
 };
+
+/**
+ * Creates zip file for current selection.
+ */
+Commands.zipSelectionCommand = {
+  execute: function(event, fileManager) {
+    var dirEntry = fileManager.directoryModel_.getCurrentDirEntry();
+    var selectionEntries = fileManager.getSelection().entries;
+    fileManager.copyManager_.zipSelection(dirEntry, fileManager.isOnGData(),
+                                          selectionEntries);
+  },
+  canExecute: function(event, fileManager) {
+    var selection = fileManager.getSelection();
+    event.canExecute = !fileManager.isOnGData() && selection &&
+        selection.totalCount > 0;
+  }
+};