Temporarily add PrivetHttpClient::GetHost method

chrome/browser/local_discovery/privet_http.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_HTTP_H_
 #define CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_HTTP_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 45 matching lines @@
 
   // Creates a URL fetcher for PrivetV1.
   virtual scoped_ptr<PrivetURLFetcher> CreateURLFetcher(
       const GURL& url,
       net::URLFetcher::RequestType request_type,
       PrivetURLFetcher::Delegate* delegate) = 0;
 
   virtual void RefreshPrivetToken(
       const PrivetURLFetcher::TokenCallback& token_callback) = 0;
 
+  // TODO(vitalybuka): Remove all below as part of crbug.com/551631
+  // PrivetV3Session should not need to use PrivetHTTPClient.
   // After this call only HTTPS will be used. Only requests to the server with
   // matching certificate will be allowed.
   // Privet v3 devices MUST support HTTPS. Before communicating over HTTPS,
   // Privet v3 pairing generates a shared secret using SPAKE2 over an
   // unauthenticated channel. This shared secret is used to then authenticate
   // the fingerprint of a certificate, which is self-signed. The client then
   // validates that the HTTPS peer is sending a certificate matching that
   // fingerprint.
   // For more information on this protocol:
   // https://developers.google.com/cloud-devices/v1/reference/local-api/pairing_start
   virtual void SwitchToHttps(
       uint16_t port,
       const net::SHA256HashValue& certificate_fingerprint) = 0;
 
   virtual bool IsInHttpsMode() const = 0;
+
+  virtual std::string GetHost() const = 0;
 };
 
 class PrivetDataReadOperation {
  public:
   enum ResponseType {
     RESPONSE_TYPE_ERROR,
     RESPONSE_TYPE_STRING,
     RESPONSE_TYPE_FILE
   };
 
@@ skipping 130 matching lines @@
   virtual scoped_ptr<PrivetJSONOperation> CreateCapabilitiesOperation(
       const PrivetJSONOperation::ResultCallback& callback) = 0;
 
   // Creates operation to submit print job to local printer.
   virtual scoped_ptr<PrivetLocalPrintOperation> CreateLocalPrintOperation(
       PrivetLocalPrintOperation::Delegate* delegate) = 0;
 };
 
 }  // namespace local_discovery
 #endif  // CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_HTTP_H_