Remove legacy StartsWithASCII function.

chromeos/system/version_loader.cc

Index: chromeos/system/version_loader.cc
diff --git a/chromeos/system/version_loader.cc b/chromeos/system/version_loader.cc
index 4e6272c27e477d58b3479b204c7db2aba046b9bd..a5604d8f16d176160598ea8d3adcce314bfb2766 100644
--- a/chromeos/system/version_loader.cc
+++ b/chromeos/system/version_loader.cc
@@ -78,7 +78,8 @@ std::string ParseFirmware(const std::string& contents) {
   std::vector<std::string> lines;
   base::SplitString(contents, '\n', &lines);
   for (size_t i = 0; i < lines.size(); ++i) {
-    if (base::StartsWithASCII(lines[i], kFirmwarePrefix, false)) {
+    if (base::StartsWith(lines[i], kFirmwarePrefix,
+                         base::CompareCase::INSENSITIVE_ASCII)) {
       std::string str = lines[i].substr(std::string(kFirmwarePrefix).size());
       size_t found = str.find_first_not_of("| ");
       if (found != std::string::npos)