Remove use of the MediaPlayback assertion

https://bugs.webkit.org/show_bug.cgi?id=271801
rdar://119496105

Reviewed by Chris Dumez and Andy Estes.

Disable the use of the MediaPlayback assertion for WebKit process extensions, since process runtime is
handled by Media endowments in this case.

* Source/WebKit/UIProcess/WebProcessPool.cpp:
* Source/WebKit/UIProcess/WebProcessProxy.cpp:

Canonical link: https://commits.webkit.org/276828@main

Source/WebKit/UIProcess/WebProcessPool.cpp

@@ -94,6 +94,7 @@
 #include <WebCore/GamepadProvider.h>
 #include <WebCore/MockRealtimeMediaSourceCenter.h>
 #include <WebCore/NetworkStorageSession.h>
+#include <WebCore/PlatformMediaSessionManager.h>
 #include <WebCore/PlatformScreen.h>
 #include <WebCore/ProcessIdentifier.h>
 #include <WebCore/ProcessWarming.h>
@@ -2305,6 +2306,11 @@ void WebProcessPool::clearAudibleActivity()
 
 void WebProcessPool::updateAudibleMediaAssertions()
 {
+#if ENABLE(EXTENSION_CAPABILITIES)
+    if (PlatformMediaSessionManager::mediaCapabilityGrantsEnabled())
+        return;
+#endif
+
     if (!m_webProcessWithAudibleMediaCounter.value()) {
         WEBPROCESSPOOL_RELEASE_LOG(ProcessSuspension, "updateAudibleMediaAssertions: Starting timer to clear audible activity in %g seconds because we are no longer playing audio", audibleActivityClearDelay.seconds());
         // We clear the audible activity on a timer for 2 reasons:

Source/WebKit/UIProcess/WebProcessProxy.cpp

@@ -1860,6 +1860,11 @@ String WebProcessProxy::environmentIdentifier() const
 
 void WebProcessProxy::updateAudibleMediaAssertions()
 {
+#if ENABLE(EXTENSION_CAPABILITIES)
+    if (PlatformMediaSessionManager::mediaCapabilityGrantsEnabled())
+        return;
+#endif
+
     bool hasAudibleWebPage = WTF::anyOf(pages(), [] (auto& page) {
         return page->isPlayingAudio();
     });