Blimp Settings framework on the c++ side

blimp/client/core/settings/settings_observer.cc

Index: blimp/client/core/settings/settings_observer.cc
diff --git a/blimp/client/core/settings/settings_observer.cc b/blimp/client/core/settings/settings_observer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..27f2a5b77e4c63528ea8e463bacda4c0d6f333f4
--- /dev/null
+++ b/blimp/client/core/settings/settings_observer.cc
@@ -0,0 +1,25 @@
+// 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 "blimp/client/core/settings/settings_observer.h"
+
+#include "blimp/client/core/settings/settings.h"
+
+namespace blimp {
+namespace client {
+
+SettingsObserver::SettingsObserver(Settings* settings) : settings_(settings) {
+  if(settings_) {
+    settings_->AddObserver(this);
+  }
+}
+
+SettingsObserver::~SettingsObserver() {
+  if (settings_) {
+    settings_->RemoveObserver(this);
+  }
+}
+
+}  // namespace client
+}  // namespace blimp