Initial import.

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diff --git a/chromium/content/browser/gamepad/gamepad_service.h b/chromium/content/browser/gamepad/gamepad_service.h
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+// 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.
+
+#ifndef CONTENT_BROWSER_GAMEPAD_GAMEPAD_SERVICE_H
+#define CONTENT_BROWSER_GAMEPAD_GAMEPAD_SERVICE_H
+
+#include "base/basictypes.h"
+#include "base/callback_forward.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/shared_memory.h"
+#include "base/memory/singleton.h"
+#include "base/threading/thread_checker.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class GamepadDataFetcher;
+class GamepadProvider;
+class GamepadServiceTestConstructor;
+class RenderProcessHost;
+
+// Owns the GamepadProvider (the background polling thread) and keeps track of
+// the number of consumers currently using the data (and pausing the provider
+// when not in use).
+class CONTENT_EXPORT GamepadService {
+ public:
+  // Returns the GamepadService singleton.
+  static GamepadService* GetInstance();
+
+  // Increments the number of users of the provider. The Provider is running
+  // when there's > 0 users, and is paused when the count drops to 0.
+  //
+  // Must be called on the I/O thread.
+  void AddConsumer();
+
+  // Removes a consumer. Should be matched with an AddConsumer call.
+  //
+  // Must be called on the I/O thread.
+  void RemoveConsumer();
+
+  // Registers the given closure for calling when the user has interacted with
+  // the device. This callback will only be issued once. Should only be called
+  // while a consumer is active.
+  void RegisterForUserGesture(const base::Closure& closure);
+
+  // Returns the shared memory handle of the gamepad data duplicated into the
+  // given process.
+  base::SharedMemoryHandle GetSharedMemoryHandleForProcess(
+      base::ProcessHandle handle);
+
+  // Stop/join with the background thread in GamepadProvider |provider_|.
+  void Terminate();
+
+ private:
+  friend struct DefaultSingletonTraits<GamepadService>;
+  friend class GamepadServiceTestConstructor;
+
+  GamepadService();
+
+  // Constructor for testing. This specifies the data fetcher to use for a
+  // provider, bypassing the default platform one.
+  GamepadService(scoped_ptr<GamepadDataFetcher> fetcher);
+
+  virtual ~GamepadService();
+
+  int num_readers_;
+  scoped_ptr<GamepadProvider> provider_;
+
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(GamepadService);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_SERVICE_H_