Bookmark name inputs should only allow single-line input

chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm

 // Copyright (c) 2011 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.
 
 #include <stack>
 
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.h"
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
@@ skipping 549 matching lines @@
     // Expose the parent folder children.
     [folderTreeView_ expandItem:parentInfo];
 
     // Select the new folder node and put the folder name into edit mode.
     selection = [selection indexPathByAddingIndex:[children count] - 1];
     [self setTableSelectionPath:selection];
     NSInteger row = [folderTreeView_ selectedRow];
     DCHECK(row >= 0);
 
     // Put the cell into single-line mode before putting it into edit mode.
+    // TODO(kushi.p): Remove this when the project hits a 10.6+ only state.
     NSCell* folderCell = [folderTreeView_ preparedCellAtColumn:0 row:row];
     if ([folderCell
           respondsToSelector:@selector(setUsesSingleLineMode:)]) {
       [folderCell setUsesSingleLineMode:YES];
     }
 
     [folderTreeView_ editColumn:0 row:row withEvent:nil select:YES];
   }
 }
 
@@ skipping 78 matching lines @@
 }
 
 // Implementing isEqual: allows the NSTreeController to preserve the selection
 // and open/shut state of outline items when the data changes.
 - (BOOL)isEqual:(id)other {
   return [other isKindOfClass:[BookmarkFolderInfo class]] &&
       folderNode_ == [(BookmarkFolderInfo*)other folderNode];
 }
 
 @end