Simplify resolution of mojo: URLs.

shell/filename_util.cc

 // Copyright 2014 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 "shell/filename_util.h"
 
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "url/gurl.h"
@@ skipping 39 matching lines @@
                                FILE_PATH_LITERAL("%3F"));
 
 #if defined(OS_POSIX)
   ReplaceSubstringsAfterOffset(&url_string, 0, FILE_PATH_LITERAL("\\"),
                                FILE_PATH_LITERAL("%5C"));
 #endif
 
   return GURL(url_string);
 }
 
+GURL AddTrailingSlashIfNeeded(const GURL& url) {
+  if (!url.has_path() || *url.path().rbegin() == '/')
+    return url;
+
+  std::string path(url.path() + '/');
+  GURL::Replacements replacements;
+  replacements.SetPathStr(path);
+  return url.ReplaceComponents(replacements);
+}
+
 }  // namespace mojo