[Remoting Android] Fix split-screen crash

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

 // 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.
 
 package org.chromium.chromoting;
 
 import android.annotation.SuppressLint;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
@@ skipping 159 matching lines @@
     }
 
     @Override
     protected void onStop() {
         mClient.getCapabilityManager().removeListener(this);
         mActivityLifecycleListener.onActivityStopped(this);
         super.onStop();
         mClient.enableVideoChannel(false);
     }
 
+    @Override
+    protected void onDestroy() {
+        mRemoteHostDesktop.destroy();
+        super.onDestroy();
+    }
+
     /** Called to initialize the action bar. */
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         getMenuInflater().inflate(R.menu.desktop_actionbar, menu);
 
         mActivityLifecycleListener.onActivityCreatedOptionsMenu(this, menu);
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
             // We don't need to show a hide ActionBar button if immersive fullscreen is supported.
             menu.findItem(R.id.actionbar_hide).setVisible(false);
@@ skipping 344 matching lines @@
     @Override
     public boolean dispatchKeyEvent(KeyEvent event) {
         if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
             mClient.destroy();
             return super.dispatchKeyEvent(event);
         }
 
         return mInjector.sendKeyEvent(event);
     }
 }