Update Commit and GetUpdatesResponse messages to include attachment ids.

sync/internal_api/sync_manager_impl.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 "sync/internal_api/sync_manager_impl.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 208 matching lines @@
       !a.ref(syncable::UNIQUE_SERVER_TAG).empty()) {
     return false;
   }
   if (a.ref(syncable::IS_DIR) != b.ref(syncable::IS_DIR))
     return true;
   if (!AreSpecificsEqual(cryptographer,
                          a.ref(syncable::SPECIFICS),
                          b.ref(syncable::SPECIFICS))) {
     return true;
   }
+  if (!AreAttachmentMetadataEqual(a.ref(syncable::ATTACHMENT_METADATA),
+                                  b.ref(syncable::ATTACHMENT_METADATA))) {
+    return true;
+  }
   // We only care if the name has changed if neither specifics is encrypted
   // (encrypted nodes blow away the NON_UNIQUE_NAME).
   if (!a_specifics.has_encrypted() && !b_specifics.has_encrypted() &&
       a.ref(syncable::NON_UNIQUE_NAME) != b.ref(syncable::NON_UNIQUE_NAME))
     return true;
   if (VisiblePositionsDiffer(mutation))
     return true;
   return false;
 }
 
@@ skipping 905 matching lines @@
 int SyncManagerImpl::GetDefaultNudgeDelay() {
   return kDefaultNudgeDelayMilliseconds;
 }
 
 // static.
 int SyncManagerImpl::GetPreferencesNudgeDelay() {
   return kPreferencesNudgeDelayMilliseconds;
 }
 
 }  // namespace syncer