throwExceptionIfClosedOrUpdating  190 Source/modules/mediasource/MediaSourceBase.cpp     if (throwExceptionIfClosedOrUpdating(isOpen(), isUpdating(), exceptionState))
throwExceptionIfClosedOrUpdating  248 Source/modules/mediasource/MediaSourceBase.cpp     if (throwExceptionIfClosedOrUpdating(isOpen(), isUpdating(), exceptionState))