Remove JNI onload callback vector construction in favour of direct calls.

net/test/android/net_test_entry_point.cc

 // Copyright 2015 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_android.h"
 #include "net/test/android/net_test_jni_onload.h"
 
 // This is called by the VM when the shared library is first loaded.
 JNI_EXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
-  if (!net::test::OnJNIOnLoadRegisterJNI(vm) || !net::test::OnJNIOnLoadInit()) {
+  base::android::InitVM(vm);
+  JNIEnv* env = base::android::AttachCurrentThread();
+  if (!net::test::OnJNIOnLoadRegisterJNI(env) ||
+      !net::test::OnJNIOnLoadInit()) {
     return -1;
   }
   return JNI_VERSION_1_4;
 }