Update the test_data_chromium.cc comment

We no longer generate a giant C++ file, but we still need this because
of Chromium test infrastructure limitations.

Change-Id: Ia89af9682155f0b22a1ebb9857746f095ce85278
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5548173
Auto-Submit: David Benjamin <davidben@chromium.org>
Reviewed-by: Bob Beck <bbe@chromium.org>
Commit-Queue: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1319245}
NOKEYCHECK=True
GitOrigin-RevId: cd52a684c771084d75cec3dc39e49bbda8e5643f
diff --git a/test_data_chromium.cc b/test_data_chromium.cc
index acf157d..62723db 100644
--- a/test_data_chromium.cc
+++ b/test_data_chromium.cc
@@ -8,9 +8,9 @@
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 
-// BoringSSL requires a GetTestData function to pick up test data files. By
-// default, BoringSSL generates a source file with the data embedded, but this
-// exceeds the limit for the _CheckForTooLargeFiles presubmit check.
+// Tests running on Chromium infrastructure cannot find their test data without
+// using `base::PathService`, so we swap out the `GetTestData` function with a
+// Chromium-specific one.
 std::string GetTestData(const char *path) {
   base::FilePath file_path;
   base::PathService::Get(base::DIR_SRC_TEST_DATA_ROOT, &file_path);