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

device/gamepad/gamepad_user_gesture.h

Index: device/gamepad/gamepad_user_gesture.h
diff --git a/device/gamepad/gamepad_user_gesture.h b/device/gamepad/gamepad_user_gesture.h
index d88601ff5523431d1d6c3c73928585c26d69cde8..fa7e73c9d676b0e65ed0f97d88eea8db968f7265 100644
--- a/device/gamepad/gamepad_user_gesture.h
+++ b/device/gamepad/gamepad_user_gesture.h
@@ -5,15 +5,13 @@
 #ifndef DEVICE_GAMEPAD_USER_GESTURE_H_
 #define DEVICE_GAMEPAD_USER_GESTURE_H_
 
-namespace blink {
-class WebGamepads;
-}
-
 namespace device {
 
+class Gamepads;
+
 // Returns true if any of the gamepads have a button pressed or axis moved
 // that would be considered a user gesture for interaction.
-bool GamepadsHaveUserGesture(const blink::WebGamepads& gamepads);
+bool GamepadsHaveUserGesture(const Gamepads& gamepads);
 
 }  // namespace device