Mac bookmark mgr: Restore previously selected group when search field is cleared.

chrome/browser/cocoa/bookmark_tree_controller.mm

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/cocoa/bookmark_tree_controller.h"
 
 #include "app/l10n_util_mac.h"
 #include "base/logging.h"
 #import "chrome/browser/cocoa/bookmark_item.h"
 #import "chrome/browser/cocoa/bookmark_manager_controller.h"
@@ skipping 132 matching lines @@
       return NO;
   }
   if (![outline_ isExpandable:item])
     return NO;
   [outline_ expandItem:item];
   DCHECK([outline_ isItemExpanded:item]);
   return YES;
 }
 
 - (BOOL)revealItem:(BookmarkItem*)item {
-  if (![self expandItem:[item parent]])
+  if ([item parent] && ![self expandItem:[item parent]])
     return NO;
   [outline_ scrollRowToVisible:[outline_ rowForItem:item]];
   [self setSelectedItems:[NSArray arrayWithObject:item]];
   return YES;
 }
 
 - (BOOL)getInsertionParent:(BookmarkItem**)outParent
                      index:(NSUInteger*)outIndex {
   NSArray* selItems = [self actionItems];
   NSUInteger numSelected = [selItems count];
@@ skipping 290 matching lines @@
       [NSFont smallSystemFontSize]] retain];
   static NSFont* sPlainFont = [[NSFont systemFontOfSize:
       [NSFont smallSystemFontSize]] retain];
   [cell setFont:[item isFixed] ? sBoldFont : sPlainFont];
 }
 
 // Updates the tree after the data model has changed.
 - (void)itemChanged:(id)nodeItem childrenChanged:(BOOL)childrenChanged {
   if (nodeItem == group_)
     nodeItem = nil;
+  NSArray* sel = [self selectedItems];
   [outline_ reloadItem:nodeItem reloadChildren:childrenChanged];
+  [self setSelectedItems:sel];
 }
 
 @end
 
 
 @implementation BookmarksOutlineView
 
 - (BookmarkTreeController*)bookmarkController {
   return (BookmarkTreeController*)[self delegate];
 }
@@ skipping 46 matching lines @@
     }
   }
   [super keyDown:event];
 }
 
 - (NSMenu*)menu {
   return [[self bookmarkController] menu];
 }
 
 @end