Cherry-pick b4a103a. rdar://problem/102994291

    [iOS] 256753@main breaks YouTube sign in
    https://bugs.webkit.org/show_bug.cgi?id=248825
    rdar://102994291

    Reviewed by Chris Dumez.

    256753@main breaks YouTube Sign in. Reverting source changes but not
    test changes.

    * Source/WebKit/UIProcess/ProcessThrottler.cpp:
    (WebKit::ProcessThrottler::setThrottleState):

    Canonical link: https://commits.webkit.org/257477@main

Canonical link: https://commits.webkit.org/257350.4@safari-7615.1.14-branch

Source/WebKit/UIProcess/ProcessThrottler.cpp

@@ -159,9 +159,6 @@ std::optional<ProcessAssertionType> ProcessThrottler::assertionTypeForState(Proc
 
 void ProcessThrottler::setThrottleState(ProcessThrottleState newState)
 {
-    if (m_state == newState && (m_assertion && m_assertion->isValid()))
-        return;
-
     m_state = newState;
     m_process.didChangeThrottleState(newState);
 
@@ -173,6 +170,9 @@ void ProcessThrottler::setThrottleState(ProcessThrottleState newState)
         return;
     }
 
+    if (m_assertion && m_assertion->isValid() && m_assertion->type() == newType)
+        return;
+
     PROCESSTHROTTLER_RELEASE_LOG("setThrottleState: Updating process assertion type to %u (foregroundActivities=%u, backgroundActivities=%u)", newType, m_foregroundActivities.size(), m_backgroundActivities.size());
 
     // Keep the previous assertion active until the new assertion is taken asynchronously.