ChangeLog

2020-07-06  Peng Liu  <peng.liu6@apple.com>

        REGRESSION (r261001): ASSERTION FAILED: m_clientCounts.contains(contextId) in WebKit::VideoFullscreenManagerProxy::removeClientForContext

        https://bugs.webkit.org/show_bug.cgi?id=212986

        Reviewed by NOBODY (OOPS!).

        * UIProcess/Cocoa/VideoFullscreenManagerProxy.mm:

        (WebKit::VideoFullscreenManagerProxy::removeClientForContext):

        Function removeClientForContext() could be called multiple times with the same contextId.

        We should bail out if m_clientCounts does not contain the contextId.

2020-06-30  Brent Fulgham  <bfulgham@apple.com>

        [macOS] Stop blocking two audio-related user client classes

Source/WebKit/UIProcess/Cocoa/VideoFullscreenManagerProxy.mm

@@void VideoFullscreenManagerProxy::addClientForContext(PlaybackSessionContextIden

void VideoFullscreenManagerProxy::removeClientForContext(PlaybackSessionContextIdentifier contextId)

{

461 ASSERT(m_clientCounts.contains(contextId));

461 if (!m_clientCounts.contains(contextId))

462 return;

    int clientCount = m_clientCounts.get(contextId);

    ASSERT(clientCount > 0);