[Sync] Gracefully handle writing to a node when the cryptographer is not ready.

chrome/browser/sync/engine/get_commit_ids_command.h

 // Copyright (c) 2006-2009 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_SYNC_ENGINE_GET_COMMIT_IDS_COMMAND_H_
 #define CHROME_BROWSER_SYNC_ENGINE_GET_COMMIT_IDS_COMMAND_H_
 #pragma once
 
 #include <utility>
 #include <vector>
@@ skipping 11 matching lines @@
 class GetCommitIdsCommand : public SyncerCommand {
   friend class SyncerTest;
 
  public:
   explicit GetCommitIdsCommand(int commit_batch_size);
   virtual ~GetCommitIdsCommand();
 
   // SyncerCommand implementation.
   virtual void ExecuteImpl(sessions::SyncSession* session);
 
+  // Filter |unsynced_handles| to exclude all handles to entries that require
+  // encryption but are in plaintext.
+  static void FilterEntriesNeedingEncryption(
+      const syncable::ModelTypeSet& encrypted_types,
+      syncable::BaseTransaction* trans,
+      syncable::Directory::UnsyncedMetaHandles* unsynced_handles);
+
   // Builds a vector of IDs that should be committed.
   void BuildCommitIds(const vector<int64>& unsynced_handles,
                       syncable::WriteTransaction* write_transaction,
                       const ModelSafeRoutingInfo& routes);
 
   // TODO(chron): Remove writes from this iterator. As a warning, this
   // iterator causes writes to entries and so isn't a pure iterator.
   // It will do Put(IS_UNSYNCED). Refactor this out later.
   class CommitMetahandleIterator {
    public:
@@ skipping 95 matching lines @@
   scoped_ptr<sessions::OrderedCommitSet> ordered_commit_set_;
 
   int requested_commit_batch_size_;
 
   DISALLOW_COPY_AND_ASSIGN(GetCommitIdsCommand);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_GET_COMMIT_IDS_COMMAND_H_