drive: Change FileCache::GetCacheEntry's return type to FileError

chrome/browser/chromeos/drive/file_system/open_file_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/open_file_operation.h"
 
 #include <map>
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 145 matching lines @@
   EXPECT_EQ(FILE_ERROR_OK, error);
   ASSERT_TRUE(base::PathExists(file_path));
   int64 local_file_size;
   ASSERT_TRUE(base::GetFileSize(file_path, &local_file_size));
   EXPECT_EQ(file_size, local_file_size);
 
   ASSERT_FALSE(close_callback.is_null());
   close_callback.Run();
   EXPECT_EQ(1U, observer()->updated_local_ids().count(src_entry.local_id()));
 
-  bool success = false;
   FileCacheEntry cache_entry;
   base::PostTaskAndReplyWithResult(
       blocking_task_runner(),
       FROM_HERE,
       base::Bind(&internal::FileCache::GetCacheEntry,
                  base::Unretained(cache()),
                  src_entry.local_id(),
                  &cache_entry),
-      google_apis::test_util::CreateCopyResultCallback(&success));
+      google_apis::test_util::CreateCopyResultCallback(&error));
   test_util::RunBlockingPoolTask();
-  EXPECT_TRUE(success);
+  EXPECT_EQ(FILE_ERROR_OK, error);
   EXPECT_TRUE(cache_entry.is_present());
   EXPECT_TRUE(cache_entry.is_dirty());
 }
 
 TEST_F(OpenFileOperationTest, OpenOrCreateNonExistingFile) {
   const base::FilePath file_in_root(
       FILE_PATH_LITERAL("drive/root/not-exist.txt"));
 
   FileError error = FILE_ERROR_FAILED;
   base::FilePath file_path;
@@ skipping 68 matching lines @@
   EXPECT_TRUE(observer()->updated_local_ids().empty());
 
   close_callback2.Run();
 
   // Here, all the clients close the file, so it should be uploaded then.
   EXPECT_EQ(1U, observer()->updated_local_ids().count(src_entry.local_id()));
 }
 
 }  // namespace file_system
 }  // namespace drive