[Device Service] Move Gamepad Blink headers to be part of the Gamepad client library

device/gamepad/public/cpp/gamepad.h

Index: device/gamepad/public/cpp/gamepad.h
diff --git a/device/gamepad/public/cpp/gamepad.h b/device/gamepad/public/cpp/gamepad.h
new file mode 100644
index 0000000000000000000000000000000000000000..c8a7e8bd27b955146b3c5569441e109b0fd1fa26
--- /dev/null
+++ b/device/gamepad/public/cpp/gamepad.h
@@ -0,0 +1,115 @@
+// Copyright 2017 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 DEVICE_GAMEPAD_PUBLIC_CPP_GAMEPAD_H_
+#define DEVICE_GAMEPAD_PUBLIC_CPP_GAMEPAD_H_
+
+#include <stddef.h>
+
+namespace device {
+
+#pragma pack(push, 4)
+
+class GamepadButton {
+ public:
+  GamepadButton() : pressed(false), touched(false), value(0.) {}
+  GamepadButton(bool pressed, bool touched, double value)
+      : pressed(pressed), touched(touched), value(value) {}
+  bool pressed;
+  bool touched;
+  double value;
+};
+
+class GamepadVector {
+ public:
+  GamepadVector() : not_null(false) {}
+
+  bool not_null;
+  float x, y, z;
+};
+
+class GamepadQuaternion {
+ public:
+  GamepadQuaternion() : not_null(false) {}
+
+  bool not_null;
+  float x, y, z, w;
+};
+
+class GamepadPose {
+ public:
+  GamepadPose() : not_null(false) {}
+
+  bool not_null;
+
+  bool has_orientation;
+  bool has_position;
+
+  GamepadQuaternion orientation;
+  GamepadVector position;
+  GamepadVector angular_velocity;
+  GamepadVector linear_velocity;
+  GamepadVector angular_acceleration;
+  GamepadVector linear_acceleration;
+};
+
+enum class GamepadHand { kNone = 0, kLeft = 1, kRight = 2 };
+
+// UTF-16 character type
+#if defined(WIN32)
+using UChar = wchar_t;
+#else
+using UChar = unsigned short;
+#endif
+
+// This structure is intentionally POD and fixed size so that it can be shared
+// memory between hardware polling threads and the rest of the browser. See
+// also gamepads.h.
+class Gamepad {
+ public:
+  static constexpr size_t kIdLengthCap = 128;
+  static constexpr size_t kMappingLengthCap = 16;
+  static constexpr size_t kAxesLengthCap = 16;
+  static constexpr size_t kButtonsLengthCap = 32;
+
+  Gamepad();
+  Gamepad(const Gamepad& other);
+
+  // Is there a gamepad connected at this index?
+  bool connected;
+
+  // Device identifier (based on manufacturer, model, etc.).
+  UChar id[kIdLengthCap];
+
+  // Monotonically increasing value referring to when the data were last
+  // updated.
+  unsigned long long timestamp;
+
+  // Number of valid entries in the axes array.
+  unsigned axes_length;
+
+  // Normalized values representing axes, in the range [-1..1].
+  double axes[kAxesLengthCap];
+
+  // Number of valid entries in the buttons array.
+  unsigned buttons_length;
+
+  // Button states
+  GamepadButton buttons[kButtonsLengthCap];
+
+  // Mapping type (for example "standard")
+  UChar mapping[kMappingLengthCap];
+
+  GamepadPose pose;
+
+  GamepadHand hand;
+
+  unsigned display_id;
+};
+
+#pragma pack(pop)
+
+}  // namespace device
+
+#endif  // DEVICE_GAMEPAD_PUBLIC_CPP_GAMEPAD_H_