Remove reference to ProbeForLowSeverityLifetimeIssue()

Rewrite a comment to remove a comment referencing code removed by
https://pdfium-review.googlesource.com/112412.

Change-Id: I34cd1c3261310ad6c6dc0033c60be730a5853f45
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/112431
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Auto-Submit: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
diff --git a/core/fpdfapi/parser/cpdf_stream_acc_unittest.cpp b/core/fpdfapi/parser/cpdf_stream_acc_unittest.cpp
index c22e655..eef91f7 100644
--- a/core/fpdfapi/parser/cpdf_stream_acc_unittest.cpp
+++ b/core/fpdfapi/parser/cpdf_stream_acc_unittest.cpp
@@ -22,8 +22,8 @@
   EXPECT_TRUE(stream_acc->GetSpan().empty());
 }
 
-// Regression test for crbug.com/1361849. Should not trigger
-// ProbeForLowSeverityLifetimeIssue() failure.
+// Regression test for crbug.com/1361849. Should not trigger dangling pointer
+// failure with UnownedPtr.
 TEST(StreamAccTest, DataStreamLifeTime) {
   constexpr uint8_t kData[] = {'a', 'b', 'c'};
   auto stream = pdfium::MakeRetain<CPDF_Stream>();