Reset sSpareSandboxedConnection when it gets unavailable

content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java

Index: content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java b/content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java
index 13620da37f41459f2b5c764a5ce937dff8570c2f..580c781c9875ebbc446e2a1c630ac7e7a33fb140 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java
@@ -305,6 +305,8 @@ public class ChildProcessLauncher {
     private static final long FREE_CONNECTION_DELAY_MILLIS = 1;
 
     private static void freeConnection(ChildProcessConnection connection) {
+        if (connection.equals(sSpareSandboxedConnection)) sSpareSandboxedConnection = null;
+
         // Freeing a service should be delayed. This is so that we avoid immediately reusing the
         // freed service (see http://crbug.com/164069): the framework might keep a service process
         // alive when it's been unbound for a short time. If a new connection to the same service