Revert of Suppress findbugs warnings on Chromium for syncronized methods

customtabs/src/android/support/customtabs/CustomTabsSession.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
@@ skipping 10 matching lines @@
 import android.graphics.Bitmap;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.os.RemoteException;
 import android.support.annotation.NonNull;
 import android.support.customtabs.CustomTabsService.Result;
 import android.support.customtabs.CustomTabsSessionToken.DummyCallback;
 import android.widget.RemoteViews;
 
-import org.chromium.base.annotations.SuppressFBWarnings;
-
 import java.util.List;
 
 /**
  * A class to be used for Custom Tabs related communication. Clients that want to launch Custom Tabs
  * can use this class exclusively to handle all related communication.
  */
 public final class CustomTabsSession {
     private static final String TAG = "CustomTabsSession";
     private final ICustomTabsService mService;
     private final ICustomTabsCallback mCallback;
@@ skipping 112 matching lines @@
 
     public boolean validatePostMessageOrigin() {
         try {
             return mService.validatePostMessageOrigin(mCallback);
         } catch (RemoteException e) {
             return false;
         }
     }
 
     @Result
-    @SuppressFBWarnings("CHROMIUM_SYNCHRONIZED_METHOD")
     public synchronized int postMessage(String message, Bundle extras) {
         try {
             return mService.postMessage(mCallback, message, extras);
         } catch (RemoteException e) {
             return CustomTabsService.RESULT_FAILURE_REMOTE_ERROR;
         }
     }
 
     /* package */ IBinder getBinder() {
         return mCallback.asBinder();
     }
 
     /* package */ ComponentName getComponentName() {
         return mComponentName;
     }
 }