Migrating majority of gamepad from content/browser/ to device/

device/gamepad/gamepad_export.h

Index: device/gamepad/gamepad_export.h
diff --git a/device/gamepad/gamepad_export.h b/device/gamepad/gamepad_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..817b88d98c46ea2a5b35e9395039babcdb30e458
--- /dev/null
+++ b/device/gamepad/gamepad_export.h
@@ -0,0 +1,28 @@
+// Copyright 2016 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_DEVICE_GAMEPAD_EXPORT_H_
+#define DEVICE_GAMEPAD_DEVICE_GAMEPAD_EXPORT_H_
+
+#if defined(COMPONENT_BUILD) && defined(WIN32)
+
+#if defined(DEVICE_GAMEPAD_IMPLEMENTATION)
+#define DEVICE_GAMEPAD_EXPORT __declspec(dllexport)
+#else
+#define DEVICE_GAMEPAD_EXPORT __declspec(dllimport)
+#endif
+
+#elif defined(COMPONENT_BUILD) && !defined(WIN32)
+
+#if defined(DEVICE_GAMEPAD_IMPLEMENTATION)
+#define DEVICE_GAMEPAD_EXPORT __attribute__((visibility("default")))
+#else
+#define DEVICE_GAMEPAD_EXPORT
+#endif
+
+#else
+#define DEVICE_GAMEPAD_EXPORT
+#endif
+
+#endif  // DEVICE_GAMEPAD_DEVICE_GAMEPAD_EXPORT_H_