Add BlimpContents[,Observer] and BlimpNavigationController

blimp/client/core/blimp_contents_impl.cc

Index: blimp/client/core/blimp_contents_impl.cc
diff --git a/blimp/client/core/blimp_contents_impl.cc b/blimp/client/core/blimp_contents_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ac4e264ed2bde580bc0d853dde7ec5c681e261ea
--- /dev/null
+++ b/blimp/client/core/blimp_contents_impl.cc
@@ -0,0 +1,34 @@
+// 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/blimp_contents_impl.h"
+
+#include "base/memory/ptr_util.h"
+#include "blimp/client/core/public/blimp_contents_observer.h"
+
+namespace blimp {
+namespace client {
+
+BlimpContentsImpl::BlimpContentsImpl() : navigation_controller_(this) {}
+
+BlimpContentsImpl::~BlimpContentsImpl() {}
+
+BlimpNavigationControllerImpl& BlimpContentsImpl::GetNavigationController() {
+  return navigation_controller_;
+}
+
+void BlimpContentsImpl::AddObserver(BlimpContentsObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void BlimpContentsImpl::RemoveObserver(BlimpContentsObserver* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void BlimpContentsImpl::NotifyURLLoaded(const GURL& url) {
+  FOR_EACH_OBSERVER(BlimpContentsObserver, observers_, OnURLUpdated(url));
+}
+
+}  // namespace client
+}  // namespace blimp