Suppress findbugs warnings on Chromium for syncronized methods

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

 /*
  * Copyright (C) 2015 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 package android.support.customtabs;
 
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.IBinder;
 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
  * for the {@link CustomTabsCallback} for the session if there was any.
  */
 public class CustomTabsSessionToken {
     private static final String TAG = "CustomTabsSessionToken";
     private final ICustomTabsCallback mCallbackBinder;
     private final CustomTabsCallback mCallback;
 
     /* package */ static class DummyCallback extends ICustomTabsCallback.Stub {
@@ skipping 46 matching lines @@
 
             @Override
             public void onNavigationEvent(int navigationEvent, Bundle extras) {
                 try {
                     mCallbackBinder.onNavigationEvent(navigationEvent, extras);
                 } catch (RemoteException e) {
                     Log.e(TAG, "RemoteException during ICustomTabsCallback transaction");
                 }
             }
 
+            @SuppressFBWarnings("CHROMIUM_SYNCHRONIZED_METHOD")
             @Override
             public synchronized void onMessageChannelReady(Uri origin, Bundle extras) {
                 try {
                     mCallbackBinder.onMessageChannelReady(origin, extras);
                 } catch (RemoteException e) {
                     Log.e(TAG, "RemoteException during ICustomTabsCallback transaction");
                 }
             }
 
+            @SuppressFBWarnings("CHROMIUM_SYNCHRONIZED_METHOD")
             @Override
             public synchronized void onPostMessage(String message, Bundle extras) {
                 try {
                     mCallbackBinder.onPostMessage(message, extras);
                 } catch (RemoteException e) {
                     Log.e(TAG, "RemoteException during ICustomTabsCallback transaction");
                 }
             }
 
             @Override
@@ skipping 25 matching lines @@
     }
 
     /**
      * @return {@link CustomTabsCallback} corresponding to this session if there was any non-null
      *         callbacks passed by the client.
      */
     public CustomTabsCallback getCallback() {
         return mCallback;
     }
 }