Make chrome/browser/media_galleries compile on Android

chrome/browser/media_galleries/media_folder_finder.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 "chrome/browser/media_galleries/media_folder_finder.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/files/file_enumerator.h"
@@ skipping 38 matching lines @@
 #if defined(OS_MACOSX) && !defined(OS_IOS)
   chrome::DIR_USER_APPLICATIONS,
   chrome::DIR_USER_LIBRARY,
 #endif
 #if defined(OS_LINUX)
   base::DIR_CACHE,
 #endif
 #if defined(OS_WIN) || defined(OS_LINUX)
   base::DIR_TEMP,
 #endif
+#if defined(OS_ANDROID)
+  base::DIR_ANDROID_APP_DATA,
+#endif
 };
 
 bool IsValidScanPath(const base::FilePath& path) {
   return !path.empty() && path.IsAbsolute();
 }
 
 void CountScanResult(MediaGalleryScanFileType type,
                      MediaGalleryScanResult* scan_result) {
   if (type & MEDIA_GALLERY_SCAN_FILE_TYPE_IMAGE)
     scan_result->image_count += 1;
@@ skipping 366 matching lines @@
 
   if (!IsEmptyScanResult(reply.scan_result))
     results_[path] = reply.scan_result;
 
   // Push new folders to the |folders_to_scan_| in reverse order.
   std::copy(reply.new_folders.rbegin(), reply.new_folders.rend(),
             std::back_inserter(folders_to_scan_));
 
   ScanFolder();
 }