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

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

Index: remoting/android/java/src/org/chromium/chromoting/Chromoting.java
diff --git a/remoting/android/java/src/org/chromium/chromoting/Chromoting.java b/remoting/android/java/src/org/chromium/chromoting/Chromoting.java
index 800be2e323e043b80d7705411ddc1359ec91d527..ef38ec1fa24287c5b5caf643917badea87255dd8 100644
--- a/remoting/android/java/src/org/chromium/chromoting/Chromoting.java
+++ b/remoting/android/java/src/org/chromium/chromoting/Chromoting.java
@@ -36,6 +36,7 @@ import org.chromium.chromoting.accountswitcher.AccountSwitcher;
 import org.chromium.chromoting.accountswitcher.AccountSwitcherFactory;
 import org.chromium.chromoting.help.HelpContext;
 import org.chromium.chromoting.help.HelpSingleton;
+import org.chromium.chromoting.jni.Client;
 import org.chromium.chromoting.jni.ConnectionListener;
 import org.chromium.chromoting.jni.JniInterface;
 
@@ -335,7 +336,7 @@ public class Chromoting extends AppCompatActivity implements ConnectionListener,
     @Override
     public void onDestroy() {
         super.onDestroy();
-        JniInterface.disconnectFromHost();
+        JniInterface.destroyClient();
         mAccountSwitcher.destroy();
     }
 
@@ -430,6 +431,7 @@ public class Chromoting extends AppCompatActivity implements ConnectionListener,
     }
 
     private void connectToHost(HostInfo host) {
+        Client client = JniInterface.createClient();

[Sergey Ulanov, 2015/12/21 17:58:15]

Can this be replaced with "new Client()". The Client's constructor should be
responsible for setting the global reference in JniInstance. 

[Lambros, 2016/01/29 23:58:25]

Done.

         mProgressIndicator = ProgressDialog.show(
                 this,
                 host.name,
@@ -439,11 +441,11 @@ public class Chromoting extends AppCompatActivity implements ConnectionListener,
                 new DialogInterface.OnCancelListener() {
                     @Override
                     public void onCancel(DialogInterface dialog) {
-                        JniInterface.disconnectFromHost();
+                        JniInterface.destroyClient();

[Sergey Ulanov, 2015/12/21 17:58:15]

client.destroy()?

[Lambros, 2016/01/29 23:58:25]

Done.

                     }
                 });
-        SessionConnector connector = new SessionConnector(this, this, mHostListLoader);
-        mAuthenticator = new SessionAuthenticator(this, host);
+        SessionConnector connector = new SessionConnector(client, this, this, mHostListLoader);
+        mAuthenticator = new SessionAuthenticator(this, client, host);
         connector.connectToHost(mAccount, mToken, host, mAuthenticator);
     }