Add BlimpClientContext and factory with real and dummy implementation

blimp/client/test/test_blimp_client_context_delegate.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/test/test_blimp_client_context_delegate.h"
+
+#include "blimp/client/public/blimp_client_context_delegate.h"
+
+namespace blimp {
+namespace client {
+
+TestBlimpClientContextDelegate::TestBlimpClientContextDelegate()
+    : blimp_contents_with_last_attached_helpers_() {}
+
+TestBlimpClientContextDelegate::~TestBlimpClientContextDelegate() {}
+
+void TestBlimpClientContextDelegate::AttachBlimpContentsHelpers(
+    BlimpContents* blimp_contents) {
+  blimp_contents_with_last_attached_helpers_ = blimp_contents;
+}
+
+BlimpContents*
+TestBlimpClientContextDelegate::GetBlimpContentsWithLastAttachedHelpers() {
+  return blimp_contents_with_last_attached_helpers_;
+}
+
+}  // namespace client
+}  // namespace blimp