drive: Use "/drive/root" namespace and fix Files app and tests.

chrome/browser/chromeos/drive/change_list_loader.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/change_list_loader.h"
 
 #include <set>
 
 #include "base/callback.h"
 #include "base/metrics/histogram.h"
@@ skipping 201 matching lines @@
     OnChangeListLoadComplete(callback, DRIVE_FILE_ERROR_FAILED);
     return;
   }
 
   if (directory_fetch_info.empty()) {
     // If the caller is not interested in a particular directory, just start
     // loading the change list.
     LoadChangeListFromServer(about_resource.Pass(),
                              start_changestamp,
                              callback);
-  } else if (directory_fetch_info.changestamp() < remote_changestamp) {
+  } else if (directory_fetch_info.changestamp() < remote_changestamp &&
+             !util::IsSpecialResourceId(directory_fetch_info.resource_id())) {
     // If the caller is interested in a particular directory, and the
     // directory changestamp is older than server's, start loading the
-    // directory first.
+    // directory first. Skip special entries as they are not meaningful in the
+    // server.
     DVLOG(1) << "Fast-fetching directory: " << directory_fetch_info.ToString()
              << "; remote_changestamp: " << remote_changestamp;
     const DirectoryFetchInfo new_directory_fetch_info(
         directory_fetch_info.resource_id(), remote_changestamp);
     DoLoadDirectoryFromServer(
         new_directory_fetch_info,
         base::Bind(&ChangeListLoader::StartLoadChangeListFromServer,
                    weak_ptr_factory_.GetWeakPtr(),
                    directory_fetch_info,
                    base::Passed(&about_resource),
@@ skipping 620 matching lines @@
     for (size_t i = 0; i < callbacks.size(); ++i) {
       base::MessageLoopProxy::current()->PostTask(
           FROM_HERE,
           base::Bind(callbacks[i], error));
     }
     pending_load_callback_.erase(it);
   }
 }
 
 }  // namespace drive