Add Mac gamepad input remapper

content/browser/gamepad/gamepad_standard_mappings_linux.h

Index: content/browser/gamepad/gamepad_standard_mappings_linux.h
diff --git a/content/browser/gamepad/gamepad_standard_mappings_linux.h b/content/browser/gamepad/gamepad_standard_mappings_linux.h
deleted file mode 100644
index 6d06fc6964cdf515739f382591651c80eb6511d0..0000000000000000000000000000000000000000
--- a/content/browser/gamepad/gamepad_standard_mappings_linux.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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_STANDARD_MAPPINGS_LINUX_H_
-#define CONTENT_BROWSER_GAMEPAD_GAMEPAD_STANDARD_MAPPINGS_LINUX_H_
-
-#include "base/string_piece.h"
-
-namespace WebKit {
-class WebGamepad;
-}
-
-namespace content {
-
-typedef void (*GamepadStandardMappingFunction)(
-    const WebKit::WebGamepad& original,
-    WebKit::WebGamepad* mapped);
-
-GamepadStandardMappingFunction GetGamepadStandardMappingFunction(
-    const base::StringPiece& vendor_id,
-    const base::StringPiece& product_id);
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_STANDARD_MAPPINGS_LINUX_H_