Add a hook to inject trusted Cast roots for testing purposes.

extensions/common/cast/cast_cert_validator.h

 // Copyright 2014 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 EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_
 #define EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 68 matching lines @@
                       CastDeviceCertPolicy* policy) WARN_UNUSED_RESULT;
 
 // Exposed only for unit-tests, not for use in production code.
 // Production code would get a context from VerifyDeviceCert().
 //
 // Constructs a VerificationContext that uses the provided public key.
 // The common name will be hardcoded to some test value.
 std::unique_ptr<CertVerificationContext> CertVerificationContextImplForTest(
     const base::StringPiece& spki);
 
+// Exposed only for testing, not for use in production code.
+//
+// Injects trusted root certificates into the CastTrustStore.
+// |data| must remain valid and not be mutated throughout the lifetime of
+// the program.
+// Warning: Using this function concurrently with VerifyDeviceCert()
+//          is not thread safe.
+bool AddTrustAnchorForTest(const uint8_t* data,
+                           size_t length) WARN_UNUSED_RESULT;
+
 }  // namespace cast_crypto
 }  // namespace api
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_