Revert 111189 - Add gamepad hardware data fetcher, and higher level thread container

content/browser/gamepad/gamepad_provider.h

-// Copyright (c) 2011 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 CONTENT_BROWSER_GAMEPAD_PROVIDER_H_
-#define CONTENT_BROWSER_GAMEPAD_PROVIDER_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/message_loop_proxy.h"
-#include "base/shared_memory.h"
-#include "base/system_monitor/system_monitor.h"
-#include "base/task.h"
-#include "content/browser/gamepad/data_fetcher.h"
-#include "content/common/content_export.h"
-#include "content/common/gamepad_hardware_buffer.h"
-
-namespace base {
-class Thread;
-}
-
-struct GamepadMsg_Updated_Params;
-
-namespace gamepad {
-
-class CONTENT_EXPORT Provider :
-    public base::RefCountedThreadSafe<Provider>,
-    public base::SystemMonitor::DevicesChangedObserver {
- public:
-  explicit Provider(DataFetcher* fetcher);
-
-  // Starts or Stops the provider. Called from creator_loop_.
-  void Start();
-  void Stop();
-  base::SharedMemoryHandle GetRendererSharedMemoryHandle(
-      base::ProcessHandle renderer_process);
-
- private:
-  friend class base::RefCountedThreadSafe<Provider>;
-
-  virtual ~Provider();
-
-  // Method for starting the polling, runs on polling_thread_.
-  void DoInitializePollingThread();
-
-  // Method for polling a DataFetcher. Runs on the polling_thread_.
-  void DoPoll();
-  void ScheduleDoPoll();
-
-  virtual void OnDevicesChanged() OVERRIDE;
-
-  GamepadHardwareBuffer* SharedMemoryAsHardwareBuffer();
-
-  enum { kDesiredSamplingIntervalMs = 16 };
-
-  // The Message Loop on which this object was created.
-  // Typically the I/O loop, but may be something else during testing.
-  scoped_refptr<base::MessageLoopProxy> creator_loop_;
-  scoped_ptr<DataFetcher> provided_fetcher_;
-
-  // When polling_thread_ is running, members below are only to be used
-  // from that thread.
-  scoped_ptr<DataFetcher> data_fetcher_;
-  base::SharedMemory gamepad_shared_memory_;
-  bool devices_changed_;
-
-  // Polling is done on this background thread.
-  scoped_ptr<base::Thread> polling_thread_;
-
-  static Provider* instance_;
-  base::WeakPtrFactory<Provider> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(Provider);
-};
-
-}  // namespace gamepad
-
-#endif  // CONTENT_BROWSER_GAMEPAD_PROVIDER_H_