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 cab725855ef60eee059c6b3c365945371950240d..218337173257d02f626660084aa4120479b42a31 100644
--- a/chrome/browser/resources/file_manager/js/file_manager_commands.js
+++ b/chrome/browser/resources/file_manager/js/file_manager_commands.js
@@ -258,3 +258,20 @@ 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;
+  }
+};