android: Deflake test after r463332

content/public/android/javatests/src/org/chromium/content/browser/ChildProcessLauncherTest.java

Index: content/public/android/javatests/src/org/chromium/content/browser/ChildProcessLauncherTest.java
diff --git a/content/public/android/javatests/src/org/chromium/content/browser/ChildProcessLauncherTest.java b/content/public/android/javatests/src/org/chromium/content/browser/ChildProcessLauncherTest.java
index 7e08d1ea0d8179ed27747d12859b198cd54960c9..ae5f9dfaeae11854a1254e2f1332273a097a13b7 100644
--- a/content/public/android/javatests/src/org/chromium/content/browser/ChildProcessLauncherTest.java
+++ b/content/public/android/javatests/src/org/chromium/content/browser/ChildProcessLauncherTest.java
@@ -445,7 +445,13 @@ public class ChildProcessLauncherTest extends InstrumentationTestCase {
         assertFalse(conn.getService().bindToCaller());
 
         assertEquals(1, retryConn.getServiceNumber());
-        assertTrue(retryConn.getPid() > 0);
+        CriteriaHelper.pollInstrumentationThread(
+                new Criteria("Failed waiting retry connection to get pid") {
+                    @Override
+                    public boolean isSatisfied() {
+                        return retryConn.getPid() > 0;
+                    }
+                });
         assertTrue(retryConn.getPid() != helperConnPid);
         assertTrue(retryConn.getService().bindToCaller());
     }