Adds web::NavigationItemImpl.

ios/web/navigation/navigation_item_impl_unittest.mm

+// Copyright 2014 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 "base/logging.h"
+#include "base/mac/scoped_nsobject.h"
+#include "base/memory/scoped_ptr.h"
+#include "ios/web/navigation/navigation_item_impl.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/gtest_mac.h"
+#include "testing/platform_test.h"
+
+namespace web {
+namespace {
+
+class NavigationItemTest : public PlatformTest {
+ protected:
+  virtual void SetUp() {
+    item_.reset(new NavigationItemImpl());
+  }
+
+  scoped_ptr<NavigationItemImpl> item_;
+};
+
+// TODO(stuartmorgan): Remove this once NavigationItem has actual

[blundell, 2014/10/24 07:26:50]

Isn't this TODO outdated now?

[stuartmorgan, 2014/10/24 14:57:48]

Yes, we should update it to a TODO to bring in real tests from
NavigationEntryImpl now that NI has functionality.

[rohitrao (ping after 24h), 2014/10/24 15:08:00]

Done.

+// functionality to test, instead of just being pass-throughs.
+TEST_F(NavigationItemTest, Dummy) {
+  const GURL url("http://init.test");
+  item_->SetURL(url);
+  EXPECT_TRUE(item_->GetURL().is_valid());
+}
+
+}  // namespace
+}  // namespace web