tools: start implementing blob interface

Start implementing blob interface to handle sending BLOB protocol
commands.

Change-Id: I9eeb6c1b6f49d9b0332e156e02476e2b07850d64
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/tools/test/blob_interface_mock.hpp b/tools/test/blob_interface_mock.hpp
new file mode 100644
index 0000000..1e57771
--- /dev/null
+++ b/tools/test/blob_interface_mock.hpp
@@ -0,0 +1,8 @@
+#include "blob_interface.hpp"
+
+class BlobInterfaceMock : public BlobInterface
+{
+  public:
+    virtual ~BlobInterfaceMock() = default;
+    MOCK_METHOD0(getBlobList, std::vector<std::string>());
+};