Revert of Suppress findbugs warnings on Chromium for syncronized methods

customtabs/src/android/support/customtabs/CustomTabsSessionToken.java

Index: customtabs/src/android/support/customtabs/CustomTabsSessionToken.java
diff --git a/customtabs/src/android/support/customtabs/CustomTabsSessionToken.java b/customtabs/src/android/support/customtabs/CustomTabsSessionToken.java
index 794c301ddde944fe11f4a2ece9b3fbc34a426eec..d20921737b7877613ea3327decd6ef2a63890749 100644
--- a/customtabs/src/android/support/customtabs/CustomTabsSessionToken.java
+++ b/customtabs/src/android/support/customtabs/CustomTabsSessionToken.java
@@ -23,8 +23,6 @@
 import android.os.RemoteException;
 import android.support.v4.app.BundleCompat;
 import android.util.Log;
-
-import org.chromium.base.annotations.SuppressFBWarnings;
 
 /**
  * Wrapper class that can be used as a unique identifier for a session. Also contains an accessor
@@ -92,7 +90,6 @@
                 }
             }
 
-            @SuppressFBWarnings("CHROMIUM_SYNCHRONIZED_METHOD")
             @Override
             public synchronized void onMessageChannelReady(Uri origin, Bundle extras) {
                 try {
@@ -102,7 +99,6 @@
                 }
             }
 
-            @SuppressFBWarnings("CHROMIUM_SYNCHRONIZED_METHOD")
             @Override
             public synchronized void onPostMessage(String message, Bundle extras) {
                 try {