[Remoting Android] Fix split-screen crash

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

Index: remoting/android/java/src/org/chromium/chromoting/Desktop.java
diff --git a/remoting/android/java/src/org/chromium/chromoting/Desktop.java b/remoting/android/java/src/org/chromium/chromoting/Desktop.java
index c5f194f8ca5aa905f26241c2f9a73e84215cdcc3..c115749677ffb9dab8db7ecd28567fc8e5b79200 100644
--- a/remoting/android/java/src/org/chromium/chromoting/Desktop.java
+++ b/remoting/android/java/src/org/chromium/chromoting/Desktop.java
@@ -177,6 +177,12 @@ public class Desktop
         mClient.enableVideoChannel(false);
     }
 
+    @Override
+    protected void onDestroy() {
+        mRemoteHostDesktop.destroy();
+        super.onDestroy();
+    }
+
     /** Called to initialize the action bar. */
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {