Push one function from the Mac drag/drop util code to ui/.

ui/base/dragdrop/cocoa_dnd_util.h

Index: ui/base/dragdrop/cocoa_dnd_util.h
diff --git a/ui/base/dragdrop/cocoa_dnd_util.h b/ui/base/dragdrop/cocoa_dnd_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..9277856af18a808e111146dcf9349aa66939291e
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+++ b/ui/base/dragdrop/cocoa_dnd_util.h
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+// 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.
+
+#ifndef UI_BASE_DRAGDROP_MAC_DND_UTIL_H_
+#define UI_BASE_DRAGDROP_MAC_DND_UTIL_H_
+#pragma once
+
+#import <Cocoa/Cocoa.h>
+
+#include <vector>
+
+#include "base/string16.h"
+#include "ui/base/ui_export.h"
+
+class GURL;
+
+namespace ui {
+
+// Populates the |url| and |title| with URL data in |pboard|. There may be more
+// than one, but we only handle dropping the first. |url| must not be |NULL|;
+// |title| is an optional parameter. Returns |YES| if URL data was obtained from
+// the pasteboard, |NO| otherwise. If |convert_filenames| is |YES|, the function
+// will also attempt to convert filenames in |pboard| to file URLs.
+UI_EXPORT BOOL PopulateURLAndTitleFromPasteboard(GURL* url,
+                                                 string16* title,
+                                                 NSPasteboard* pboard,
+                                                 BOOL convert_filenames);
+
+}  // namespace ui
+
+#endif  // UI_BASE_DRAGDROP_MAC_DND_UTIL_H_