Revert of Cast device revocation checking.

components/cast_certificate/cast_cert_validator_test_helpers.cc

 // 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.
 
 #include "components/cast_certificate/cast_cert_validator_test_helpers.h"
 
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "net/cert/pem_tokenizer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cast_certificate {
 
 namespace testing {
 
+namespace {
+
+// Reads a file from the test data directory
+// (//src/components/test/data/cast_certificate)
 std::string ReadTestFileToString(const base::StringPiece& file_name) {
   base::FilePath filepath;
   PathService::Get(base::DIR_SOURCE_ROOT, &filepath);
   filepath = filepath.Append(FILE_PATH_LITERAL("components"));
   filepath = filepath.Append(FILE_PATH_LITERAL("test"));
   filepath = filepath.Append(FILE_PATH_LITERAL("data"));
   filepath = filepath.Append(FILE_PATH_LITERAL("cast_certificate"));
   filepath = filepath.AppendASCII(file_name);
 
   // Read the full contents of the file.
   std::string file_data;
   if (!base::ReadFileToString(filepath, &file_data)) {
     ADD_FAILURE() << "Couldn't read file: " << filepath.value();
     return std::string();
   }
 
   return file_data;
 }
 
+}  // namespace
+
 std::vector<std::string> ReadCertificateChainFromFile(
     const base::StringPiece& file_name) {
   std::string file_data = ReadTestFileToString(file_name);
 
   std::vector<std::string> pem_headers;
   pem_headers.push_back("CERTIFICATE");
 
   std::vector<std::string> certs;
   net::PEMTokenizer pem_tokenizer(file_data, pem_headers);
   while (pem_tokenizer.GetNext())
@@ skipping 31 matching lines @@
   EXPECT_FALSE(result.message.empty());
   EXPECT_FALSE(result.signature_sha1.empty());
   EXPECT_FALSE(result.signature_sha256.empty());
 
   return result;
 }
 
 }  // namespace testing
 
 }  // namespace cast_certificate