Remove some legacy versions of StartsWith and EndsWith.

third_party/zlib/google/zip_reader.cc

Index: third_party/zlib/google/zip_reader.cc
diff --git a/third_party/zlib/google/zip_reader.cc b/third_party/zlib/google/zip_reader.cc
index d3c2775844a5ddb1dc687c8d72c2cac17b449bca..e0871c85367321c785c31383f8cf8d2a28000027 100644
--- a/third_party/zlib/google/zip_reader.cc
+++ b/third_party/zlib/google/zip_reader.cc
@@ -131,7 +131,8 @@ ZipReader::EntryInfo::EntryInfo(const std::string& file_name_in_zip,
   original_size_ = raw_file_info.uncompressed_size;
 
   // Directory entries in zip files end with "/".
-  is_directory_ = base::EndsWith(file_name_in_zip, "/", false);
+  is_directory_ = base::EndsWith(file_name_in_zip, "/",
+                                 base::CompareCase::INSENSITIVE_ASCII);
 
   // Check the file name here for directory traversal issues.
   is_unsafe_ = file_path_.ReferencesParent();