Remove some legacy versions of StartsWith and EndsWith.

tools/gn/ninja_target_writer.cc

Index: tools/gn/ninja_target_writer.cc
diff --git a/tools/gn/ninja_target_writer.cc b/tools/gn/ninja_target_writer.cc
index e03b2d21a25898d6160c69944b68f2cd81fe3a26..7913735421450842c71a20627d8db601089a8e49 100644
--- a/tools/gn/ninja_target_writer.cc
+++ b/tools/gn/ninja_target_writer.cc
@@ -242,7 +242,8 @@ void NinjaTargetWriter::WriteStampForTarget(
 
   // First validate that the target's dependency is a stamp file. Otherwise,
   // we shouldn't have gotten here!
-  CHECK(base::EndsWith(stamp_file.value(), ".stamp", false))
+  CHECK(base::EndsWith(stamp_file.value(), ".stamp",
+                       base::CompareCase::INSENSITIVE_ASCII))
       << "Output should end in \".stamp\" for stamp file output. Instead got: "
       << "\"" << stamp_file.value() << "\"";