sync: Add GetAllSyncData to sync/api

chrome/browser/sync/glue/shared_change_processor.cc

Index: chrome/browser/sync/glue/shared_change_processor.cc
diff --git a/chrome/browser/sync/glue/shared_change_processor.cc b/chrome/browser/sync/glue/shared_change_processor.cc
index abe7070867a8eb6ff0b41d037498adccda088034..e10e4b5ef1c0e97f412d4bae1c043ead41810672 100644
--- a/chrome/browser/sync/glue/shared_change_processor.cc
+++ b/chrome/browser/sync/glue/shared_change_processor.cc
@@ -135,6 +135,18 @@ syncer::SyncError SharedChangeProcessor::ProcessSyncChanges(
       from_here, list_of_changes);
 }
 
+syncer::SyncDataList SharedChangeProcessor::GetAllSyncData(
+    syncer::ModelType type) const {
+  DCHECK(backend_loop_.get());
+  DCHECK(backend_loop_->BelongsToCurrentThread());
+  AutoLock lock(monitor_lock_);
+  if (disconnected_) {
+    LOG(ERROR) << "Change processor disconnected.";
+    return syncer::SyncDataList();
+  }
+  return generic_change_processor_->GetAllSyncData(type);
+}
+
 bool SharedChangeProcessor::SyncModelHasUserCreatedNodes(bool* has_nodes) {
   DCHECK(backend_loop_.get());
   DCHECK(backend_loop_->BelongsToCurrentThread());