Gamepad API: add support for connection events

content/common/gamepad_connection_event_message_params.h

Index: content/common/gamepad_connection_event_message_params.h
diff --git a/content/common/gamepad_connection_event_message_params.h b/content/common/gamepad_connection_event_message_params.h
new file mode 100644
index 0000000000000000000000000000000000000000..f04755da268ebc3f970e4c890482842cd3c95d6b
--- /dev/null
+++ b/content/common/gamepad_connection_event_message_params.h
@@ -0,0 +1,29 @@
+#ifndef CONTENT_COMMON_GAMEPAD_CONNECTION_EVENT_MESSAGE_PARAMS
+#define CONTENT_COMMON_GAMEPAD_CONNECTION_EVENT_MESSAGE_PARAMS
+
+#include "third_party/WebKit/public/platform/WebGamepad.h"
+
+#include <vector>
+
+namespace content {
+
+struct GamepadConnectionEventMessageParams {
+  GamepadConnectionEventMessageParams();
+  GamepadConnectionEventMessageParams(int index,
+                                      const blink::WebGamepad& gamepad);
+  ~GamepadConnectionEventMessageParams();
+
+  void GetWebGamepad(blink::WebGamepad* gamepad) const;
+
+  std::vector<blink::WebUChar> id_characters;
+  std::vector<blink::WebUChar> mapping_characters;
+  int index;
+  unsigned long long timestamp;
+  int axes_length;
+  int buttons_length;
+  bool connected;
+};
+
+} // namespace content
+
+#endif // CONTENT_COMMON_GAMEPAD_CONNECTION_EVENT_MESSAGE_PARAMS