Refactored gamepad polling to support dynamic sources

device/gamepad/gamepad_test_helpers.h

 // 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 DEVICE_GAMEPAD_GAMEPAD_TEST_HELPERS_H_
 #define DEVICE_GAMEPAD_GAMEPAD_TEST_HELPERS_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 10 matching lines @@
 
 // Data fetcher that returns canned data for the gamepad provider.
 class MockGamepadDataFetcher : public GamepadDataFetcher {
  public:
   // Initializes the fetcher with the given gamepad data, which will be
   // returned when the provider queries us.
   explicit MockGamepadDataFetcher(const blink::WebGamepads& test_data);
 
   ~MockGamepadDataFetcher() override;
 
+  GamepadSource source() override;
+
   // GamepadDataFetcher.
-  void GetGamepadData(blink::WebGamepads* pads,
-                      bool devices_changed_hint) override;
+  void GetGamepadData(bool devices_changed_hint) override;
 
   // Blocks the current thread until the GamepadProvider reads from this
   // fetcher on the background thread.
   void WaitForDataRead();
 
   // Blocks the current thread until the GamepadProvider reads from this
   // fetcher on the background thread and issued all callbacks related to the
   // read on the client's thread.
   void WaitForDataReadAndCallbacksIssued();
 
@@ skipping 35 matching lines @@
  private:
   // This must be constructed before the system monitor.
   base::MessageLoop message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(GamepadTestHelper);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_GAMEPAD_GAMEPAD_TEST_HELPERS_H_