Update from https://crrev.com/312398

base/test/gtest_util.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 BASE_TEST_GTEST_UTIL_H_
 #define BASE_TEST_GTEST_UTIL_H_
 
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/compiler_specific.h"
 
 namespace base {
 
 class FilePath;
 
 // First value is test case name, second one is test name.
 typedef std::pair<std::string, std::string> SplitTestName;
 
 // Returns a vector of gtest-based tests compiled into
 // current executable.
 std::vector<SplitTestName> GetCompiledInTests();
 
 // Writes the list of gtest-based tests compiled into
 // current executable as a JSON file. Returns true on success.
 bool WriteCompiledInTestsToFile(const FilePath& path) WARN_UNUSED_RESULT;
 
+// Reads the list of gtest-based tests from |path| into |output|.
+// Returns true on success.
+bool ReadTestNamesFromFile(
+    const FilePath& path,
+    std::vector<SplitTestName>* output) WARN_UNUSED_RESULT;
+
 }  // namespace base
 
 #endif  // BASE_TEST_GTEST_UTIL_H_