IsSameKey use HttpHeaderName

Author: scotthart

google/cloud/internal/http_header.cc

@@ -47,8 +47,8 @@ bool operator<(HttpHeader const& lhs, HttpHeader const& rhs) {
   return lhs.name_ < rhs.name_;
 }
 
-bool HttpHeader::IsSameKey(std::string_view key) const {
-  return name_.name() == absl::AsciiStrToLower(key);
+bool HttpHeader::IsSameKey(HttpHeaderName const& name) const {
+  return name_ == name.name();
 }
 
 bool HttpHeader::IsSameKey(HttpHeader const& other) const {

google/cloud/internal/http_header.h

@@ -119,7 +119,7 @@ class HttpHeader {
 
   // Performs a case-insensitive comparison of the key.
   bool IsSameKey(HttpHeader const& other) const;
-  bool IsSameKey(std::string_view key) const;
+  bool IsSameKey(HttpHeaderName const& name) const;
 
   std::string name() const { return name_; }
   std::vector<std::string> const& values() const { return values_; }