MD Bookmarks: Update Delete command to only delete the minimal set of nodes

chrome/test/data/webui/md_bookmarks/command_manager_test.js

Index: chrome/test/data/webui/md_bookmarks/command_manager_test.js
diff --git a/chrome/test/data/webui/md_bookmarks/command_manager_test.js b/chrome/test/data/webui/md_bookmarks/command_manager_test.js
index 07e414cbabcd682f5cc9384ab45a058d23e290de..c0b993b10b610861bd39a54401e8f121f881077f 100644
--- a/chrome/test/data/webui/md_bookmarks/command_manager_test.js
+++ b/chrome/test/data/webui/md_bookmarks/command_manager_test.js
@@ -25,13 +25,19 @@ suite('<bookmarks-command-manager>', function() {
 
   setup(function() {
     store = new bookmarks.TestStore({
-      nodes: testTree(createFolder(
-          '1',
-          [
-            createFolder('11', []),
-            createFolder('12', []),
-            createItem('13'),
-          ])),
+      nodes: testTree(
+          createFolder(
+              '1',
+              [
+                createFolder(
+                    '11',
+                    [
+                      createItem('111'),
+                    ]),
+                createFolder('12', []),
+                createItem('13'),
+              ]),
+          createFolder('2', [])),
     });
     bookmarks.Store.instance_ = store;
 
@@ -111,4 +117,17 @@ suite('<bookmarks-command-manager>', function() {
     MockInteractions.pressAndReleaseKeyOn(document, keyCode, '', key);
     assertLastCommand('edit', ['11']);
   });
+
+  test('does not delete children at same time as ancestor', function() {
+    var lastDelete = null;
+    chrome.bookmarkManagerPrivate.removeTrees = function(idArray) {
+      lastDelete = idArray.sort();
+    };
+
+    var parentAndChildren = new Set(['1', '2', '12', '111']);
+    assertTrue(commandManager.canExecute(Command.DELETE, parentAndChildren));
+    commandManager.handle(Command.DELETE, parentAndChildren);
+
+    assertDeepEquals(['1', '2'], lastDelete);
+  });
 });