Rename jni_helper.h to jni_weak_ref.h.

base/android/jni_helper.cc

-// Copyright (c) 2012 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_helper.h"
-
-#include "base/android/jni_android.h"
-#include "base/logging.h"
-
-using base::android::AttachCurrentThread;
-
-JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef()
-  : obj_(NULL) {
-}
-
-JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(
-    const JavaObjectWeakGlobalRef& orig)
-    : obj_(NULL) {
-  Assign(orig);
-}
-
-JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj)
-    : obj_(env->NewWeakGlobalRef(obj)) {
-  DCHECK(obj_);
-}
-
-JavaObjectWeakGlobalRef::~JavaObjectWeakGlobalRef() {
-  reset();
-}
-
-void JavaObjectWeakGlobalRef::operator=(const JavaObjectWeakGlobalRef& rhs) {
-  Assign(rhs);
-}
-
-void JavaObjectWeakGlobalRef::reset() {
-  if (obj_) {
-    AttachCurrentThread()->DeleteWeakGlobalRef(obj_);
-    obj_ = NULL;
-  }
-}
-
-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) {
-    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;
-}