Move browser-side File API unittests next to the files they cover.

storage/browser/test/mock_file_update_observer.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 "base/threading/thread_task_runner_handle.h"
-#include "content/browser/fileapi/mock_file_update_observer.h"
+#include "storage/browser/test/mock_file_update_observer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace storage {
 
 MockFileUpdateObserver::MockFileUpdateObserver() : is_ready_(false) {
 }
 
 MockFileUpdateObserver::~MockFileUpdateObserver() {
 }
 
@@ skipping 16 matching lines @@
   int end = end_update_count_[url];
   EXPECT_LT(0, start - end);
 }
 
 void MockFileUpdateObserver::OnEndUpdate(const FileSystemURL& url) {
   if (is_ready_)
     ++end_update_count_[url];
 }
 
 }  // namespace storage