Convert string16 to base::string16 in content.

content/browser/web_contents/web_drag_dest_gtk.cc

 // 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 "content/browser/web_contents/web_drag_dest_gtk.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 186 matching lines @@
         for (gchar** uri_iter = uris; *uri_iter; uri_iter++) {
           // Most file managers populate text/uri-list with file URLs when
           // dragging files. To avoid exposing file system paths to web content,
           // file URLs are never set as the URL content for the drop.
           // TODO(estade): Can the filenames have a non-UTF8 encoding?
           GURL url(*uri_iter);
           base::FilePath file_path;
           if (url.SchemeIs(chrome::kFileScheme) &&
               net::FileURLToFilePath(url, &file_path)) {
             drop_data_->filenames.push_back(
-                DropData::FileInfo(UTF8ToUTF16(file_path.value()), string16()));
+                DropData::FileInfo(UTF8ToUTF16(file_path.value()),
+                                   base::string16()));
             // This is a hack. Some file managers also populate text/plain with
             // a file URL when dragging files, so we clear it to avoid exposing
             // it to the web content.
             drop_data_->text = base::NullableString16();
           } else if (!drop_data_->url.is_valid()) {
             // Also set the first non-file URL as the URL content for the drop.
             drop_data_->url = url;
           }
         }
         g_strfreev(uris);
@@ skipping 111 matching lines @@
   gtk_drag_finish(context, is_drop_target_, FALSE, time);
 
   return TRUE;
 }
 
 RenderViewHostImpl* WebDragDestGtk::GetRenderViewHost() const {
   return static_cast<RenderViewHostImpl*>(web_contents_->GetRenderViewHost());
 }
 
 }  // namespace content