Address follow-up comments from https://codereview.chromium.org/2626413004/.

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 d6ae7c6bc69dc586f747a9256f5155da0310a9cd..5f1a34bddfcf90b848a82669554103450e683072 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
@@ -399,6 +399,8 @@ public class ChildProcessLauncherTest extends InstrumentationTestCase {
                     }
                 });
 
+        triggerConnectionSetup((ChildProcessConnectionImpl) conn);
+
         assertEquals(0, conn.getServiceNumber());
         assertEquals(-1, conn.getPid());  // PID gets set to -1 if service is already bound.