Cast device revocation checking.

components/cast_certificate/cast_cert_validator_test_helpers.cc

Index: components/cast_certificate/cast_cert_validator_test_helpers.cc
diff --git a/components/cast_certificate/cast_cert_validator_test_helpers.cc b/components/cast_certificate/cast_cert_validator_test_helpers.cc
index 78c092b1e6ebcbdd58db013b0f52140a73537810..850f7e1c477d18efb6f26415e401670825619e83 100644
--- a/components/cast_certificate/cast_cert_validator_test_helpers.cc
+++ b/components/cast_certificate/cast_cert_validator_test_helpers.cc
@@ -86,6 +86,13 @@ SignatureTestData ReadSignatureTestData(const base::StringPiece& file_name) {
   return result;
 }
 
+std::string ReadFromFile(const base::StringPiece& file_name) {

[eroman, 2016/07/12 21:22:00]

This function seems unnecessary -- How about instead just exposing
ReadTestFileToString() in the header?
(You can add the EXPECT_FALSE() into it if you like too).

[ryanchung, 2016/07/14 16:15:25]

Done.

+  std::string file_data = ReadTestFileToString(file_name);
+
+  EXPECT_FALSE(file_data.empty());
+  return file_data;
+}
+
 }  // namespace testing
 
 }  // namespace cast_certificate