Revert of Test Keeping NaCl plugins used in app background pages alive when active.

ppapi/tests/extensions/background_keepalive/background.cc

-// Copyright (c) 2013 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 <cstdio>
-#include <string>
-
-#include "ppapi/cpp/instance.h"
-#include "ppapi/cpp/message_loop.h"
-#include "ppapi/cpp/module.h"
-#include "ppapi/cpp/var.h"
-#include "ppapi/utility/completion_callback_factory.h"
-
-class Instance : public pp::Instance {
- public:
-  explicit Instance(PP_Instance instance) :
-      pp::Instance(instance),
-      callback_factory_(this),
-      delay_milliseconds_(10),
-      active_(true) {
-    DoSomething(PP_OK);
-  }
-  virtual ~Instance() {}
-
-  virtual void HandleMessage(const pp::Var& message_var) {
-    std::string message_string = message_var.AsString();
-    if (message_string == "be idle") {
-      active_ = false;
-    } else {
-      PostMessage("Unhandled control message.");
-    }
-  }
-
-  void DoSomething(int32_t result) {
-    if (active_) {
-      pp::MessageLoop loop = pp::MessageLoop::GetCurrent();
-      pp::CompletionCallback c = callback_factory_.NewCallback(
-          &Instance::DoSomething);
-      loop.PostWork(c, delay_milliseconds_);
-    }
-  }
-
-  pp::CompletionCallbackFactory<Instance> callback_factory_;
-  int delay_milliseconds_;
-  bool active_;
-};
-
-class Module : public pp::Module {
- public:
-  Module() : pp::Module() {}
-  virtual ~Module() {}
-
-  virtual pp::Instance* CreateInstance(PP_Instance instance) {
-    return new Instance(instance);
-  }
-};
-
-namespace pp {
-Module* CreateModule() {
-  return new ::Module();
-}
-}  // namespace pp
-