Bookmark name inputs should only allow single-line input

chrome/browser/ui/cocoa/bookmarks/bookmark_editor_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.
 
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_editor_controller.h"
 
 #include "base/string16.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_expanded_state_tracker.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
+#import "chrome/browser/ui/cocoa/bookmarks/bookmark_cell_single_line.h"
 #include "ui/base/l10n/l10n_util.h"
 
 @interface BookmarkEditorController (Private)
 
 // Grab the url from the text field and convert.
 - (GURL)GURLFromUrlField;
 
 @end
 
 @implementation BookmarkEditorController
@@ skipping 19 matching lines @@
   }
   return self;
 }
 
 - (void)dealloc {
   [displayURL_ release];
   [super dealloc];
 }
 
 - (void)awakeFromNib {
+  // Check if NSTextFieldCell supports the method. This check is in place as
+  // only 10.6 and greater support the setUsesSingleLineMode method.
+  // TODO(kushi.p): Remove this when the project hits a 10.6+ only state.
+  NSTextFieldCell* nameFieldCell_ = [nameTextField_ cell];
+  if ([nameFieldCell_
+          respondsToSelector:@selector(setUsesSingleLineMode:)]) {
+    [nameFieldCell_ setUsesSingleLineMode:YES];
+  }
+
   // Set text fields to match our bookmark.  If the node is NULL we
   // arrived here from an "Add Page..." item in a context menu.
   if (node_) {
     [self setInitialName:base::SysUTF16ToNSString(node_->GetTitle())];
     std::string url_string = node_->url().possibly_invalid_spec();
     initialUrl_.reset([[NSString stringWithUTF8String:url_string.c_str()]
                         retain]);
   } else {
     GURL url;
     string16 title16;
@@ skipping 89 matching lines @@
       SetExpandedNodes(expanded_nodes);
   return [NSNumber numberWithBool:YES];
 }
 
 - (NSColor *)urlFieldColor {
   return [urlField_ backgroundColor];
 }
 
 @end  // BookmarkEditorController