Remove now-unnecessary .obj() in Java method calls.

chrome/browser/android/signin/signin_promo_util_android.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/android/signin/signin_promo_util_android.h"
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
 #include "jni/SigninPromoUtil_jni.h"
 #include "ui/android/window_android.h"
 
 namespace chrome {
 namespace android {
 
 // static
 void SigninPromoUtilAndroid::StartAccountSigninActivityForPromo(
     content::ContentViewCore* content_view_core,
     signin_metrics::AccessPoint access_point) {
   if (content_view_core && content_view_core->GetWindowAndroid()) {
     Java_SigninPromoUtil_openAccountSigninActivityForPromo(
         base::android::AttachCurrentThread(),
-        content_view_core->GetWindowAndroid()->GetJavaObject().obj(),
+        content_view_core->GetWindowAndroid()->GetJavaObject(),
         jint(access_point));
   }
 }
 
 }  // namespace android
 }  // namespace chrome