Add BlimpClientContext and factory with real and dummy implementation

blimp/client/core/blimp_client_context_impl_unittest.cc

+// 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_client_context_impl.h"
+
+#include "blimp/client/public/blimp_client_context_delegate.h"
+#include "blimp/client/public/blimp_contents.h"
+#include "blimp/client/test/test_blimp_client_context_delegate.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blimp {
+namespace client {
+namespace {
+
+TEST(BlimpClientContextImpl, CreatedBlimpContentsGetsHelpersAttached) {
+  BlimpClientContextImpl blimp_client_context;
+  TestBlimpClientContextDelegate delegate;
+  blimp_client_context.SetDelegate(&delegate);
+
+  std::unique_ptr<BlimpContents> blimp_contents =
+      blimp_client_context.CreateBlimpContents();
+  DCHECK(blimp_contents);
+  DCHECK_EQ(blimp_contents.get(),
+            delegate.GetBlimpContentsWithLastAttachedHelpers());
+}
+
+}  // namespace
+}  // namespace client
+}  // namespace blimp