Add a integration test suite for BlobChannel.

blimp/common/blob_cache/test_util.h

Index: blimp/common/blob_cache/test_util.h
diff --git a/blimp/common/blob_cache/test_util.h b/blimp/common/blob_cache/test_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..c2279a5b57b1ee43931bb85562e3bc0b0eb4e0c6
--- /dev/null
+++ b/blimp/common/blob_cache/test_util.h
@@ -0,0 +1,18 @@
+// 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_COMMON_BLOB_CACHE_TEST_UTIL_H_
+#define BLIMP_COMMON_BLOB_CACHE_TEST_UTIL_H_
+
+#include <string>
+
+#include "blimp/common/blob_cache/blob_cache.h"
+
+namespace blimp {
+
+BlobDataPtr CreateBlobDataPtr(const std::string& data);
+
+}  // namespace blimp
+
+#endif  // BLIMP_COMMON_BLOB_CACHE_TEST_UTIL_H_