Reland r42300: "HttpRequestHeaders refactor.""

net/http/http_network_transaction.h

Index: net/http/http_network_transaction.h
diff --git a/net/http/http_network_transaction.h b/net/http/http_network_transaction.h
index ca4e88209d72823091bddfcc4e2994c585f8b45c..85118088d219e12f1affd7efd201d38a4245b3cf 100644
--- a/net/http/http_network_transaction.h
+++ b/net/http/http_network_transaction.h
@@ -33,6 +33,7 @@ class ClientSocketFactory;
 class ClientSocketHandle;
 class SpdyStream;
 class HttpNetworkSession;
+class HttpRequestHeaders;
 class HttpStream;
 
 class HttpNetworkTransaction : public HttpTransaction {
@@ -214,9 +215,10 @@ class HttpNetworkTransaction : public HttpTransaction {
   // Returns true if we should try to add an Authorization header.
   bool ShouldApplyServerAuth() const;
 
-  // Builds either the proxy auth header, or the origin server auth header,
+  // Adds either the proxy auth header, or the origin server auth header,
   // as specified by |target|.
-  std::string BuildAuthorizationHeader(HttpAuth::Target target) const;
+  void AddAuthorizationHeader(
+      HttpAuth::Target target, HttpRequestHeaders* authorization_headers) const;
 
   // Returns a log message for all the response headers related to the auth
   // challenge.