Rename jni_helper.h to jni_weak_ref.h.

base/android/jni_weak_ref.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_weak_ref.h"
 
 #include "base/android/jni_android.h"
 #include "base/logging.h"
 
 using base::android::AttachCurrentThread;
 
 JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef()
   : obj_(NULL) {
 }
 
@@ skipping 42 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_) : NULL;
 }