SyncFS: Introduce SyncFileSystemBackend

webkit/browser/fileapi/syncable/local_file_change_tracker_unittest.cc

 // Copyright 2013 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 "webkit/browser/fileapi/syncable/local_file_change_tracker.h"
 
 #include <deque>
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 55 matching lines @@
  protected:
   FileSystemURL URL(const std::string& path) {
     return file_system_.URL(path);
   }
 
   FileSystemContext* file_system_context() {
     return file_system_.file_system_context();
   }
 
   LocalFileChangeTracker* change_tracker() {
-    return file_system_context()->change_tracker();
+    return file_system_.mount_provider()->change_tracker();
   }
 
   void VerifyAndClearChange(const FileSystemURL& url,
                             const FileChange& expected_change) {
     SCOPED_TRACE(testing::Message() << url.DebugString() <<
                  " expecting:" << expected_change.DebugString());
     // Get the changes for URL and verify.
     FileChangeList changes;
     change_tracker()->GetChangesForURL(url, &changes);
     ASSERT_EQ(1U, changes.size());
@@ skipping 508 matching lines @@
   ASSERT_EQ(2U, urls_to_process.size());
 
   // The exact order of recursive removal cannot be determined.
   EXPECT_TRUE(URL(kPath1) == urls_to_process[0] ||
               URL(kPath2) == urls_to_process[0]);
   EXPECT_TRUE(URL(kPath1) == urls_to_process[1] ||
               URL(kPath2) == urls_to_process[1]);
 }
 
 }  // namespace sync_file_system