Set root resource ID upon full feed update.

chrome/browser/chromeos/drive/drive_resource_metadata_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_resource_metadata.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 149 matching lines @@
   proto.set_version(kProtoVersion + 1);
   ASSERT_TRUE(proto.SerializeToString(&serialized_proto));
   // This should fail as the version is newer.
   ASSERT_FALSE(resource_metadata.ParseFromString(serialized_proto));
 }
 
 TEST_F(DriveResourceMetadataTest, GetEntryByResourceId_RootDirectory) {
   DriveResourceMetadata resource_metadata;
   // Look up the root directory by its resource ID.
   DriveEntry* entry = resource_metadata.GetEntryByResourceId(
-      kDriveRootDirectoryResourceId);
+      resource_metadata.root_resource_id());
   ASSERT_TRUE(entry);
-  EXPECT_EQ(kDriveRootDirectoryResourceId, entry->resource_id());
+  EXPECT_EQ(resource_metadata.root_resource_id(), entry->resource_id());
 }
 
 TEST_F(DriveResourceMetadataTest, GetEntryInfoByResourceId) {
   // Confirm that an existing file is found.
   DriveFileError error = DRIVE_FILE_ERROR_FAILED;
   FilePath drive_file_path;
   scoped_ptr<DriveEntryProto> entry_proto;
   resource_metadata_.GetEntryInfoByResourceId(
       "file_resource_id:file4",
       base::Bind(&test_util::CopyResultsFromGetEntryInfoWithFilePathCallback,
@@ skipping 261 matching lines @@
   // Remove unknown resource_id using RemoveEntryFromParent.
   resource_metadata_.RemoveEntryFromParent(
       "foo",
       base::Bind(&test_util::CopyResultsFromFileMoveCallback,
           &error, &drive_file_path));
   gdata::test_util::RunBlockingPoolTask();
   EXPECT_EQ(DRIVE_FILE_ERROR_NOT_FOUND, error);
 
   // Try removing root. This should fail.
   resource_metadata_.RemoveEntryFromParent(
-      kDriveRootDirectoryResourceId,
+      resource_metadata_.root_resource_id(),
       base::Bind(&test_util::CopyResultsFromFileMoveCallback,
           &error, &drive_file_path));
   gdata::test_util::RunBlockingPoolTask();
   EXPECT_EQ(DRIVE_FILE_ERROR_ACCESS_DENIED, error);
 }
 
 TEST_F(DriveResourceMetadataTest, MoveEntryToDirectory) {
   DriveFileError error = DRIVE_FILE_ERROR_FAILED;
   FilePath drive_file_path;
   scoped_ptr<DriveEntryProto> entry_proto;
@@ skipping 126 matching lines @@
       FilePath::FromUTF8Unsafe("drive/dir2/file11"),
       "file11",
       base::Bind(&test_util::CopyResultsFromFileMoveCallback,
                  &error, &drive_file_path));
   gdata::test_util::RunBlockingPoolTask();
   EXPECT_EQ(DRIVE_FILE_ERROR_NOT_FOUND, error);
   EXPECT_EQ(FilePath(), drive_file_path);
 }
 
 }  // namespace drive