MiddleButtonDown 511 Source/web/WebInputEventConversion.cpp modifiers |= WebInputEvent::MiddleButtonDown; MiddleButtonDown 113 Source/web/WebInputEventFactoryGtk.cpp modifiers |= WebInputEvent::MiddleButtonDown; MiddleButtonDown 344 Source/web/WebInputEventFactoryWin.cpp result.modifiers |= WebInputEvent::MiddleButtonDown; MiddleButtonDown 442 Source/web/WebInputEventFactoryWin.cpp result.modifiers |= WebInputEvent::MiddleButtonDown;