Enable Android support for Chromoting PINless (paired) authentication

remoting/client/jni/chromoting_jni_runtime.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 REMOTING_CLIENT_JNI_CHROMOTING_JNI_RUNTIME_H_
 #define REMOTING_CLIENT_JNI_CHROMOTING_JNI_RUNTIME_H_
 
 #include <jni.h>
 
 #include "base/at_exit.h"
@@ skipping 27 matching lines @@
   scoped_refptr<AutoThreadTaskRunner> display_task_runner() {
     return display_task_runner_;
   }
 
   scoped_refptr<net::URLRequestContextGetter> url_requester() {
     return url_requester_;
   }
 
   // Initiates a connection with the specified host. Only call when a host
   // connection is active (i.e. between a call to Connect() and the
-  // corresponding call to Disconnect()).
+  // corresponding call to Disconnect()). To skip the attempt at pair-based
+  // authentication, leave |pairing_id| and |pairing_secret| as empty strings.
   void ConnectToHost(const char* username,
                      const char* auth_token,
                      const char* host_jid,
                      const char* host_id,
-                     const char* host_pubkey);
+                     const char* host_pubkey,
+                     const char* pairing_id,
+                     const char* pairing_secret);
 
   // Terminates any ongoing connection attempt and cleans up by nullifying
   // |session_|. This is a no-op unless |session| is currently non-null.
   void DisconnectFromHost();
 
   // Returns the client for the currently-active session. Do not call if
   // |session| is null.
   scoped_refptr<ChromotingJniInstance> session() {
     DCHECK(session_);
     return session_;
   }
 
-  // Notifies the user that the connection status has changed.
+  // Notifies the user of the current connection status. Call on UI thread.
   void ReportConnectionStatus(protocol::ConnectionToHost::State state,
                               protocol::ErrorCode error);
 
-  // Pops up a dialog box asking the user to enter a PIN.
+  // Pops up a dialog box asking the user to enter a PIN. Call on UI thread.
   void DisplayAuthenticationPrompt();
 
+  // Saves new pairing credentials to permanent storage. Call on UI thread.
+  void CommitPairingCredentials(const std::string& host,
+                                const std::string& id,
+                                const std::string& secret);
+
   // Updates image dimensions and canvas memory space. Call on display thread.
   void UpdateImageBuffer(int width, int height, jobject buffer);
 
   // Draws the latest image buffer onto the canvas. Call on the display thread.
   void RedrawCanvas();
 
  private:
   ChromotingJniRuntime();
 
   // Forces a DisconnectFromHost() in case there is any active or failed
@@ skipping 24 matching lines @@
   scoped_refptr<ChromotingJniInstance> session_;
 
   friend struct DefaultSingletonTraits<ChromotingJniRuntime>;
 
   DISALLOW_COPY_AND_ASSIGN(ChromotingJniRuntime);
 };
 
 }  // namespace remoting
 
 #endif