Add BlimpContents[,Observer] and BlimpNavigationController

blimp/client/core/blimp_navigation_controller_impl.cc

Index: blimp/client/core/blimp_navigation_controller_impl.cc
diff --git a/blimp/client/core/blimp_navigation_controller_impl.cc b/blimp/client/core/blimp_navigation_controller_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6c57ea09eb0aefe8f195ddde3362d4028c84236f
--- /dev/null
+++ b/blimp/client/core/blimp_navigation_controller_impl.cc
@@ -0,0 +1,43 @@
+// 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_navigation_controller_impl.h"
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/memory/ref_counted.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "blimp/client/core/blimp_navigation_controller_delegate.h"
+
+namespace blimp {
+namespace client {
+
+BlimpNavigationControllerImpl::BlimpNavigationControllerImpl(
+    BlimpNavigationControllerDelegate* delegate)
+    : delegate_(delegate), weak_ptr_factory_(this) {}
+
+BlimpNavigationControllerImpl::~BlimpNavigationControllerImpl() = default;
+
+void BlimpNavigationControllerImpl::LoadURL(const GURL& url) {
+  current_url_ = url;
+  // Temporary trick to ensure that the delegate is not invoked before this
+  // method has finished executing. This enables tests to test the
+  // asynchronous nature of the API.
+  // TODO(shaktisahu): Remove this after integration with NavigationFeature.
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE,
+      base::Bind(&BlimpNavigationControllerImpl::NotifyDelegateURLLoaded,
+                 weak_ptr_factory_.GetWeakPtr(), url));
+}
+
+const GURL& BlimpNavigationControllerImpl::GetURL() {
+  return current_url_;
+}
+
+void BlimpNavigationControllerImpl::NotifyDelegateURLLoaded(const GURL& url) {
+  delegate_->NotifyURLLoaded(url);
+}
+
+}  // namespace client
+}  // namespace blimp