android: Don't log error when checking weak ref

base/android/jni_weak_ref.cc

 // Copyright 2014 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 "base/android/jni_weak_ref.h"
 
 #include "base/android/jni_android.h"
 #include "base/logging.h"
 
 using base::android::AttachCurrentThread;
@@ skipping 29 matching lines @@
 }
 
 base::android::ScopedJavaLocalRef<jobject>
     JavaObjectWeakGlobalRef::get(JNIEnv* env) const {
   return GetRealObject(env, obj_);
 }
 
 base::android::ScopedJavaLocalRef<jobject> GetRealObject(
     JNIEnv* env, jweak obj) {
   jobject real = NULL;
-  if (obj) {
+  if (obj)
     real = env->NewLocalRef(obj);
-    if (!real)
-      DLOG(ERROR) << "The real object has been deleted!";
-  }
   return base::android::ScopedJavaLocalRef<jobject>(env, real);
 }
 
 void JavaObjectWeakGlobalRef::Assign(const JavaObjectWeakGlobalRef& other) {
   if (&other == this)
     return;
 
   JNIEnv* env = AttachCurrentThread();
   if (obj_)
     env->DeleteWeakGlobalRef(obj_);
 
   obj_ = other.obj_ ? env->NewWeakGlobalRef(other.obj_) : NULL;
 }