drive: Deal with the root directory in the same way as others in MoveOperation.

chrome/browser/chromeos/drive/drive_file_system_unittest.cc

 // Copyright (c) 2012 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/drive_file_system.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 1424 matching lines @@
 
   ASSERT_TRUE(EntryExists(dest_parent_path));
   scoped_ptr<DriveEntryProto> dest_parent_proto = GetEntryInfoByPathSync(
       dest_parent_path);
   ASSERT_TRUE(dest_parent_proto.get());
   ASSERT_TRUE(dest_parent_proto->file_info().is_directory());
   EXPECT_FALSE(dest_parent_proto->content_url().empty());
 
   // Expect notification for both source and destination directories.
   EXPECT_CALL(*mock_directory_observer_, OnDirectoryChanged(
-      Eq(FilePath(FILE_PATH_LITERAL("drive"))))).Times(1);
+      Eq(FilePath(FILE_PATH_LITERAL("drive"))))).Times(2);
   EXPECT_CALL(*mock_directory_observer_, OnDirectoryChanged(
       Eq(FilePath(FILE_PATH_LITERAL("drive/Directory 1"))))).Times(1);
 
   DriveFileError error = DRIVE_FILE_ERROR_FAILED;
   file_system_->Move(
       src_file_path,
       dest_file_path,
       base::Bind(&test_util::CopyErrorCodeFromFileOperationCallback, &error));
   google_apis::test_util::RunBlockingPoolTask();
   EXPECT_EQ(DRIVE_FILE_OK, error);
@@ skipping 21 matching lines @@
 
   ASSERT_TRUE(EntryExists(src_parent_path));
   scoped_ptr<DriveEntryProto> src_parent_proto = GetEntryInfoByPathSync(
       src_parent_path);
   ASSERT_TRUE(src_parent_proto.get());
   ASSERT_TRUE(src_parent_proto->file_info().is_directory());
   EXPECT_FALSE(src_parent_proto->content_url().empty());
 
   // Expect notification for both source and destination directories.
   EXPECT_CALL(*mock_directory_observer_, OnDirectoryChanged(
-      Eq(FilePath(FILE_PATH_LITERAL("drive"))))).Times(1);
+      Eq(FilePath(FILE_PATH_LITERAL("drive"))))).Times(2);
   EXPECT_CALL(*mock_directory_observer_, OnDirectoryChanged(
       Eq(FilePath(FILE_PATH_LITERAL("drive/Directory 1"))))).Times(1);
 
   DriveFileError error = DRIVE_FILE_ERROR_FAILED;
   file_system_->Move(
       src_file_path,
       dest_file_path,
       base::Bind(&test_util::CopyErrorCodeFromFileOperationCallback, &error));
   google_apis::test_util::RunBlockingPoolTask();
   EXPECT_EQ(DRIVE_FILE_OK, error);
@@ skipping 895 matching lines @@
 
   // An app for foo.ext_1 should now be found, as the registry was loaded.
   drive_webapps_registry_->GetWebAppsForFile(
       FilePath(FILE_PATH_LITERAL("foo.ext_1")),
       "" /* mime_type */,
       &apps);
   EXPECT_EQ(1U, apps.size());
 }
 
 }   // namespace drive