drive: Remove FileCacheObserver::OnCacheCommitted

chrome/browser/chromeos/drive/file_system/update_operation_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 "chrome/browser/chromeos/drive/file_system/update_operation.h"
 
 #include "chrome/browser/chromeos/drive/file_system/operation_test_base.h"
 #include "chrome/browser/chromeos/drive/file_system_interface.h"
 #include "chrome/browser/google_apis/fake_drive_service.h"
 #include "chrome/browser/google_apis/gdata_wapi_parser.h"
@@ skipping 49 matching lines @@
   EXPECT_EQ(FILE_ERROR_OK, error);
 
   // Add the dirty bit.
   error = FILE_ERROR_FAILED;
   cache()->MarkDirtyOnUIThread(
       kResourceId, kMd5,
       google_apis::test_util::CreateCopyResultCallback(&error));
   google_apis::test_util::RunBlockingPoolTask();
   EXPECT_EQ(FILE_ERROR_OK, error);
 
-  // Commit the dirty bit.
-  error = FILE_ERROR_FAILED;
-  cache()->CommitDirtyOnUIThread(
-      kResourceId, kMd5,
-      google_apis::test_util::CreateCopyResultCallback(&error));
-  google_apis::test_util::RunBlockingPoolTask();
-  EXPECT_EQ(FILE_ERROR_OK, error);
-
   int64 original_changestamp = fake_service()->largest_changestamp();
 
   // The callback will be called upon completion of
   // UpdateFileByResourceId().
   error = FILE_ERROR_FAILED;
   operation_->UpdateFileByResourceId(
       kResourceId,
       ClientContext(USER_INITIATED),
       google_apis::test_util::CreateCopyResultCallback(&error));
   google_apis::test_util::RunBlockingPoolTask();
@@ skipping 20 matching lines @@
   operation_->UpdateFileByResourceId(
       "file:nonexistent_resource_id",
       ClientContext(USER_INITIATED),
       google_apis::test_util::CreateCopyResultCallback(&error));
   google_apis::test_util::RunBlockingPoolTask();
   EXPECT_EQ(FILE_ERROR_NOT_FOUND, error);
 }
 
 }  // namespace file_system
 }  // namespace drive