drive: Pass through AboutResouce from server among callbacks in ChangeListLoader.

chrome/browser/chromeos/drive/change_list_processor.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_DRIVE_CHANGE_LIST_PROCESSOR_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_CHANGE_LIST_PROCESSOR_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 18 matching lines @@
 // ChangeListProcessor is used to process feeds from WAPI (codename for
 // Documents List API).
 class ChangeListProcessor {
  public:
   typedef std::map<std::string /* resource_id */, DriveEntryProto>
       DriveEntryProtoMap;
 
   // Class used to record UMA stats with FeedToEntryProtoMap().
   class ChangeListToEntryProtoMapUMAStats;
 
-  explicit ChangeListProcessor(DriveResourceMetadata* resource_metadata);
+  explicit ChangeListProcessor(DriveResourceMetadata* resource_metadata,
+                               const std::string drive_root_resource_id);
   ~ChangeListProcessor();
 
   // Applies the documents feeds to the file system using |resource_metadata_|.
   //
   // |is_delta_feed| determines the type of feed to process, whether it is a
   // root feed (false) or a delta feed (true).
   //
   // In the case of processing the root feeds |root_feed_changestamp| is used
   // as its initial changestamp value. The value comes from
   // google_apis::AccountMetadata.
@@ skipping 107 matching lines @@
                                         scoped_ptr<DriveEntryProto> root_proto);
 
   // Runs after all entries have been processed.
   void OnComplete();
 
   // Reset the state of this object.
   void Clear();
 
   DriveResourceMetadata* resource_metadata_;  // Not owned.
 
+  // Resource ID for the user's "My Drive" root. This is provided by
+  // ChangeListLoader.
+  const std::string drive_root_resource_id_;
+
   DriveEntryProtoMap entry_proto_map_;
   std::set<base::FilePath> changed_dirs_;
   GURL root_upload_url_;
   int64 largest_changestamp_;
   base::Closure on_complete_callback_;
 
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<ChangeListProcessor> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(ChangeListProcessor);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_CHANGE_LIST_PROCESSOR_H_