Add BlimpClientContext and factory with real and dummy implementation

blimp/client/test/test_blimp_client_context_delegate.h

Index: blimp/client/test/test_blimp_client_context_delegate.h
diff --git a/blimp/client/test/test_blimp_client_context_delegate.h b/blimp/client/test/test_blimp_client_context_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..977906cc55cb626528fd77565e41421b7ddefa0a
--- /dev/null
+++ b/blimp/client/test/test_blimp_client_context_delegate.h
@@ -0,0 +1,39 @@
+// 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.
+
+#ifndef BLIMP_CLIENT_TEST_TEST_BLIMP_CLIENT_CONTEXT_DELEGATE_H_
+#define BLIMP_CLIENT_TEST_TEST_BLIMP_CLIENT_CONTEXT_DELEGATE_H_
+
+#include "base/macros.h"
+#include "blimp/client/public/blimp_client_context_delegate.h"
+
+namespace blimp {
+namespace client {
+class BlimpContents;
+
+// Helper class to use in tests when a BlimpClientContextDelegate is needed.
+class TestBlimpClientContextDelegate : public BlimpClientContextDelegate {
+ public:
+  TestBlimpClientContextDelegate();
+  ~TestBlimpClientContextDelegate() override;
+
+  // BlimpClientContextDelegate implementation.
+  void AttachBlimpContentsHelpers(BlimpContents* blimp_contents) override;
+
+  // Returns the last value of the parameter given to a call to
+  // AttachBlimpContentsHelpers.
+  BlimpContents* GetBlimpContentsWithLastAttachedHelpers();
+
+ private:
+  // The last value of the parameter given to a call to
+  // AttachBlimpContentsHelpers.
+  BlimpContents* blimp_contents_with_last_attached_helpers_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestBlimpClientContextDelegate);
+};
+
+}  // namespace client
+}  // namespace blimp
+
+#endif  // BLIMP_CLIENT_TEST_TEST_BLIMP_CLIENT_CONTEXT_DELEGATE_H_