Wait for parent directory sync before performing server-side copy

chrome/browser/chromeos/drive/sync_client.h

Index: chrome/browser/chromeos/drive/sync_client.h
diff --git a/chrome/browser/chromeos/drive/sync_client.h b/chrome/browser/chromeos/drive/sync_client.h
index 0efccd67481b4a5bc478cca436e24504744e0ec6..4fc5d1fe259fc010961a8b5cb1cf85c177a94d7a 100644
--- a/chrome/browser/chromeos/drive/sync_client.h
+++ b/chrome/browser/chromeos/drive/sync_client.h
@@ -67,6 +67,11 @@ class SyncClient {
   // Adds a update task.
   void AddUpdateTask(const ClientContext& context, const std::string& local_id);
 
+  // Waits for the update task to complete and runs the callback.
+  // Returns false if no task is found for the spcecified ID.
+  bool WaitForUpdateTaskToComplete(const std::string& local_id,
+                                   const FileOperationCallback& callback);
+
   // Starts processing the backlog (i.e. pinned-but-not-filed files and
   // dirty-but-not-uploaded files). Kicks off retrieval of the local
   // IDs of these files, and then starts the sync loop.
@@ -82,9 +87,6 @@ class SyncClient {
     delay_ = delay;
   }
 
-  // Starts the sync loop if it's not running.
-  void StartSyncLoop();
-
  private:
   // Types of sync tasks.
   enum SyncType {
@@ -110,6 +112,7 @@ class SyncClient {
     bool should_run_again;
     base::Closure cancel_closure;
     std::vector<SyncTaskKey> dependent_tasks;
+    std::vector<FileOperationCallback> waiting_callbacks;
   };
 
   typedef std::map<SyncTaskKey, SyncTask> SyncTasks;