Remove null checking in JavaObjectWeakGlobalRef ctr

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 <utility>
 
 #include "base/android/jni_android.h"
 #include "base/logging.h"
 
 using base::android::AttachCurrentThread;
 
 JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef() : obj_(nullptr) {}
 
 JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(
     const JavaObjectWeakGlobalRef& orig)
     : obj_(nullptr) {
   Assign(orig);
 }
 
 JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(JavaObjectWeakGlobalRef&& orig)
     : obj_(orig.obj_) {
   orig.obj_ = nullptr;
 }
 
 JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj)
     : obj_(env->NewWeakGlobalRef(obj)) {
-  DCHECK(obj_);
 }
 
 JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(
     JNIEnv* env,
     const base::android::JavaRef<jobject>& obj)
     : obj_(env->NewWeakGlobalRef(obj.obj())) {
-  DCHECK(obj_);
 }
 
 JavaObjectWeakGlobalRef::~JavaObjectWeakGlobalRef() {
   reset();
 }
 
 void JavaObjectWeakGlobalRef::operator=(const JavaObjectWeakGlobalRef& rhs) {
   Assign(rhs);
 }
 
@@ skipping 24 matching lines @@
 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_) : nullptr;
 }