Remove some legacy versions of StartsWith and EndsWith.

net/base/mime_util.cc

Index: net/base/mime_util.cc
diff --git a/net/base/mime_util.cc b/net/base/mime_util.cc
index 27c547b6e0b371769e563dcab9239773ead952dd..9adb2fef25785d12c9f9d5f0e5269b3ebfffd3f5 100644
--- a/net/base/mime_util.cc
+++ b/net/base/mime_util.cc
@@ -524,7 +524,7 @@ void GetExtensionsForMimeType(
   const std::string mime_type = base::StringToLowerASCII(unsafe_mime_type);
   base::hash_set<base::FilePath::StringType> unique_extensions;
 
-  if (base::EndsWith(mime_type, "/*", false)) {
+  if (base::EndsWith(mime_type, "/*", base::CompareCase::INSENSITIVE_ASCII)) {
     std::string leading_mime_type = mime_type.substr(0, mime_type.length() - 1);
 
     // Find the matching StandardType from within kStandardTypes, or fall