[USS] Show USS counters in Types tab

components/sync/engine_impl/cycle/data_type_debug_info_emitter.cc

Index: components/sync/engine_impl/cycle/data_type_debug_info_emitter.cc
diff --git a/components/sync/engine_impl/cycle/data_type_debug_info_emitter.cc b/components/sync/engine_impl/cycle/data_type_debug_info_emitter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..68c3a174b84917287b0e2bea211063188fe9dbf0
--- /dev/null
+++ b/components/sync/engine_impl/cycle/data_type_debug_info_emitter.cc
@@ -0,0 +1,44 @@
+// Copyright 2016 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 "components/sync/engine_impl/cycle/data_type_debug_info_emitter.h"
+
+#include "components/sync/engine/cycle/type_debug_info_observer.h"
+
+namespace syncer {
+
+DataTypeDebugInfoEmitter::DataTypeDebugInfoEmitter(
+    ModelType type,
+    base::ObserverList<TypeDebugInfoObserver>* observers)
+    : type_(type), type_debug_info_observers_(observers) {}
+
+DataTypeDebugInfoEmitter::~DataTypeDebugInfoEmitter() {}
+
+const CommitCounters& DataTypeDebugInfoEmitter::GetCommitCounters() const {
+  return commit_counters_;
+}
+
+CommitCounters* DataTypeDebugInfoEmitter::GetMutableCommitCounters() {
+  return &commit_counters_;
+}
+
+void DataTypeDebugInfoEmitter::EmitCommitCountersUpdate() {
+  for (auto& observer : *type_debug_info_observers_)
+    observer.OnCommitCountersUpdated(type_, commit_counters_);
+}
+
+const UpdateCounters& DataTypeDebugInfoEmitter::GetUpdateCounters() const {
+  return update_counters_;
+}
+
+UpdateCounters* DataTypeDebugInfoEmitter::GetMutableUpdateCounters() {
+  return &update_counters_;
+}
+
+void DataTypeDebugInfoEmitter::EmitUpdateCountersUpdate() {
+  for (auto& observer : *type_debug_info_observers_)
+    observer.OnUpdateCountersUpdated(type_, update_counters_);
+}
+
+}  // namespace syncer