Move data reduction proxy to Chrome-Proxy header for authentication

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 24ab95b8ac21e67d6b00ea0f1c69bd368c3abba0..895ecc3d17af64fb6b8ade42ce7e2324a824aca1 100644
--- a/net/http/http_network_transaction.h
+++ b/net/http/http_network_transaction.h
@@ -31,6 +31,7 @@ class HttpNetworkSession;
 class HttpStreamBase;
 class HttpStreamRequest;
 class IOBuffer;
+class ProxyInfo;
 class SpdySession;
 struct HttpRequestInfo;
 
@@ -75,6 +76,8 @@ class NET_EXPORT_PRIVATE HttpNetworkTransaction
       WebSocketHandshakeStreamBase::CreateHelper* create_helper) OVERRIDE;
   virtual void SetBeforeNetworkStartCallback(
       const BeforeNetworkStartCallback& callback) OVERRIDE;
+  virtual void SetBeforeProxyHeadersSentCallback(
+      const BeforeProxyHeadersSentCallback& callback) OVERRIDE;
   virtual int ResumeNetworkStart() OVERRIDE;
 
   // HttpStreamRequest::Delegate methods:
@@ -334,6 +337,7 @@ class NET_EXPORT_PRIVATE HttpNetworkTransaction
       websocket_handshake_stream_base_create_helper_;
 
   BeforeNetworkStartCallback before_network_start_callback_;
+  BeforeProxyHeadersSentCallback before_proxy_headers_sent_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpNetworkTransaction);
 };