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

extensions/common/cast/cast_cert_validator.cc

 // 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.
 
 #include "extensions/common/cast/cast_cert_validator.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <algorithm>
 #include <utility>
@@ skipping 271 matching lines @@
 }
 
 scoped_ptr<CertVerificationContext> CertVerificationContextImplForTest(
     const base::StringPiece& spki) {
   // Use a bogus CommonName, since this is just exposed for testing signature
   // verification by unittests.
   return make_scoped_ptr(
       new CertVerificationContextImpl(net::der::Input(spki), "CommonName"));
 }
 
+bool AddTrustAnchorForTest(const uint8_t* data, size_t length) {
+  return CastTrustStore::Get().AddTrustedCertificateWithoutCopying(data,

[eroman, 2016/04/22 05:58:54]

If you are using the "*WithoutCopying()" flavor, please indicate so in the
documentation that |data| must remain valid for the duration of the program as
it is not copied.

Or alternately use AddTrustedCertificate() instead and it will make a copy of
the data (which would be appropriate if the data came from a std::string rather
than say an array from rodata).

[ryanchung, 2016/04/22 19:03:49]

Done, I added the warning. The certificate data will be hard coded so there's no
need to copy the data.

+                                                                   length);
+}
+
 }  // namespace cast_crypto
 }  // namespace api
 }  // namespace extensions