[Sync] Move change-related methods out of SyncManager::Observer

chrome/browser/sync/syncable/syncable.h

 // Copyright (c) 2011 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_SYNCABLE_SYNCABLE_H_
 #define CHROME_BROWSER_SYNC_SYNCABLE_SYNCABLE_H_
 #pragma once
 
 #include <algorithm>
 #include <bitset>
@@ skipping 549 matching lines @@
 
 struct EntryKernelMutation {
   EntryKernel original, mutated;
 };
 typedef std::map<int64, EntryKernelMutation> EntryKernelMutationMap;
 
 typedef browser_sync::Immutable<EntryKernelMutationMap>
     ImmutableEntryKernelMutationMap;
 
 // Caller owns the return value.
+base::DictionaryValue* EntryKernelMutationToValue(
+    const EntryKernelMutation& mutation);
+
+// Caller owns the return value.
 base::ListValue* EntryKernelMutationMapToValue(
     const EntryKernelMutationMap& mutations);
 
 // How syncable indices & Indexers work.
 //
 // The syncable Directory maintains several indices on the Entries it tracks.
 // The indices follow a common pattern:
 //   (a) The index allows efficient lookup of an Entry* with particular
 //       field values.  This is done by use of a std::set<> and a custom
 //       comparator.
@@ skipping 610 matching lines @@
 
 // This is not a reset.  It just sets the numeric fields which are not
 // initialized by the constructor to zero.
 void ZeroFields(EntryKernel* entry, int first_field);
 
 }  // namespace syncable
 
 std::ostream& operator <<(std::ostream&, const syncable::Blob&);
 
 #endif  // CHROME_BROWSER_SYNC_SYNCABLE_SYNCABLE_H_