Revert of Refactor Chromoting JNI code to use jni/Client (Java changes only).

remoting/android/java/src/org/chromium/chromoting/SessionAuthenticator.java

 // Copyright 2015 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.
 
 package org.chromium.chromoting;
 
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Build;
 import android.view.KeyEvent;
 import android.view.View;
 import android.widget.CheckBox;
 import android.widget.TextView;
 import android.widget.Toast;
 
-import org.chromium.chromoting.jni.Client;
+import org.chromium.chromoting.jni.JniInterface;
 
 /**
  * This class performs the user-interaction needed to authenticate the session connection. This
  * includes showing the PIN prompt and requesting tokens for third-party authentication.
  */
 public class SessionAuthenticator {
     /**
      * Application context used for getting user preferences, displaying UI, and fetching
      * third-party tokens.
      */
     private Chromoting mApplicationContext;
 
-    /** Client connection being authenticated. */
-    private final Client mClient;
-
     /** Provides the tokenUrlPatterns for this host during fetchThirdPartyTokens(). */
     private HostInfo mHost;
 
     /** Object for fetching OAuth2 access tokens from third party authorization servers. */
     private ThirdPartyTokenFetcher mTokenFetcher;
 
-    public SessionAuthenticator(Chromoting context, Client client, HostInfo host) {
+    public SessionAuthenticator(Chromoting context, HostInfo host) {
         mApplicationContext = context;
-        mClient = client;
         mHost = host;
     }
 
     public void displayAuthenticationPrompt(boolean pairingSupported) {
         AlertDialog.Builder pinPrompt = new AlertDialog.Builder(mApplicationContext);
         pinPrompt.setTitle(mApplicationContext.getString(R.string.title_authenticate));
         pinPrompt.setMessage(mApplicationContext.getString(R.string.pin_message_android));
         pinPrompt.setIcon(android.R.drawable.ic_lock_lock);
 
         final View pinEntry =
                 mApplicationContext.getLayoutInflater().inflate(R.layout.pin_dialog, null);
         pinPrompt.setView(pinEntry);
 
         final TextView pinTextView = (TextView) pinEntry.findViewById(R.id.pin_dialog_text);
         final CheckBox pinCheckBox = (CheckBox) pinEntry.findViewById(R.id.pin_dialog_check);
 
         if (!pairingSupported) {
             pinCheckBox.setChecked(false);
             pinCheckBox.setVisibility(View.GONE);
         }
 
         pinPrompt.setPositiveButton(
                 R.string.connect_button, new DialogInterface.OnClickListener() {
                     @Override
                     public void onClick(DialogInterface dialog, int which) {
-                        if (mClient.isConnected()) {
-                            mClient.handleAuthenticationResponse(
+                        if (JniInterface.isConnected()) {
+                            JniInterface.handleAuthenticationResponse(
                                     String.valueOf(pinTextView.getText()),
                                     pinCheckBox.isChecked(), Build.MODEL);
                         } else {
                             String message =
                                     mApplicationContext.getString(R.string.error_network_error);
                             Toast.makeText(mApplicationContext, message, Toast.LENGTH_LONG).show();
                         }
                     }
                 });
 
         pinPrompt.setNegativeButton(
                 R.string.cancel, new DialogInterface.OnClickListener() {
                     @Override
                     public void onClick(DialogInterface dialog, int which) {
-                        mClient.destroy();
+                        JniInterface.disconnectFromHost();
                     }
                 });
 
         final AlertDialog pinDialog = pinPrompt.create();
 
         pinTextView.setOnEditorActionListener(
                 new TextView.OnEditorActionListener() {
                     @Override
                     public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                         // The user pressed enter on the keypad (equivalent to the connect button).
@@ skipping 39 matching lines @@
             public void onTokenFetched(String code, String accessToken) {
                 // The native client sends the OAuth authorization code to the host as the token so
                 // that the host can obtain the shared secret from the third party authorization
                 // server.
                 String token = code;
 
                 // The native client uses the OAuth access token as the shared secret to
                 // authenticate itself with the host using spake.
                 String sharedSecret = accessToken;
 
-                mClient.onThirdPartyTokenFetched(token, sharedSecret);
+                JniInterface.onThirdPartyTokenFetched(token, sharedSecret);
             }
         };
         mTokenFetcher = new ThirdPartyTokenFetcher(mApplicationContext, mHost.getTokenUrlPatterns(),
                 callback);
         mTokenFetcher.fetchToken(tokenUrl, clientId, scope);
     }
 
     public void onNewIntent(Intent intent) {
         if (mTokenFetcher != null) {
             if (mTokenFetcher.handleTokenFetched(intent)) {
                 mTokenFetcher = null;
             }
         }
     }
 
     /** Returns the pairing ID for the given host, or an empty string if not set. */
     public String getPairingId(String hostId) {
         SharedPreferences prefs = mApplicationContext.getPreferences(Activity.MODE_PRIVATE);
         return prefs.getString(hostId + "_id", "");
     }
 
     /** Returns the pairing secret for the given host, or an empty string if not set. */
     public String getPairingSecret(String hostId) {
         SharedPreferences prefs = mApplicationContext.getPreferences(Activity.MODE_PRIVATE);
         return prefs.getString(hostId + "_secret", "");
     }
 }