mac: Fix bookmark drag and drop.

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

 // Copyright (c) 2012 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 "base/mac/scoped_nsobject.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_button.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
@@ skipping 11 matching lines @@
  @public
   int entered_;
   int exited_;
   BOOL canDragToTrash_;
   int didDragToTrashCount_;
 }
 @end
 
 @implementation FakeButtonDelegate
 
-- (void)fillPasteboard:(NSPasteboard*)pboard
-       forDragOfButton:(BookmarkButton*)button {
+- (NSPasteboardItem*)pasteboardItemForDragOfButton:(BookmarkButton*)button {
+  return nil;
 }
 
 - (void)mouseEnteredButton:(id)buton event:(NSEvent*)event {
   entered_++;
 }
 
 - (void)mouseExitedButton:(id)buton event:(NSEvent*)event {
   exited_++;
 }
 
@@ skipping 146 matching lines @@
                 operation:NSDragOperationMove];
   EXPECT_EQ(0, delegate.get()->didDragToTrashCount_);
   [button draggingSession:nil
              endedAtPoint:NSZeroPoint
                 operation:NSDragOperationDelete];
   EXPECT_EQ(1, delegate.get()->didDragToTrashCount_);
 #pragma clang diagnostic pop
 }
 
 }