Update from https://crrev.com/312398

base/test/gtest_util.h

Index: base/test/gtest_util.h
diff --git a/base/test/gtest_util.h b/base/test/gtest_util.h
index 93382f846665c514e48f8cfc3a3cae9b1f4cfe44..d10c72fcf6fbc25e1fa6f3789af65a41e30993d6 100644
--- a/base/test/gtest_util.h
+++ b/base/test/gtest_util.h
@@ -26,6 +26,12 @@ std::vector<SplitTestName> GetCompiledInTests();
 // 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_