Revert of [Android] Add a java.lang.System wrapper.

base/android/java_system.h

-// Copyright (c) 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.
-
-#ifndef BASE_ANDROID_JAVA_SYSTEM_H_
-#define BASE_ANDROID_JAVA_SYSTEM_H_
-
-#include <string>
-
-#include "base/android/jni_android.h"
-#include "base/base_export.h"
-#include "base/strings/string_piece.h"
-
-namespace base {
-namespace android {
-
-// Wrapper class for using the java.lang.System object from jni.
-class BASE_EXPORT JavaSystem {
- public:
-  // Registers the jni class (once per process).
-  static bool Register(JNIEnv* env);
-
-  // See java.lang.System.getProperty().
-  static std::string GetProperty(const base::StringPiece& stroperty_name);
-};
-
-}  // namespace android
-}  // namespace base
-
-#endif  // BASE_ANDROID_JAVA_SYSTEM_H_