Avoid taking near suspended assertion in processes with no pages

https://bugs.webkit.org/show_bug.cgi?id=270252
rdar://123788018

Reviewed by Chris Dumez.

In 272937@main, we stopped taking the near suspended assertion by default in most cases. However, I
forgot to change WebProcessProxy::shouldTakeNearSuspendedAssertion() to consult that default value
in the no page case. This fixes that issue.

* Source/WebKit/UIProcess/WebProcessProxy.cpp:
(WebKit::WebProcessProxy::shouldTakeNearSuspendedAssertion const):

Canonical link: https://commits.webkit.org/275509@main

Source/WebKit/UIProcess/WebProcessProxy.cpp

@@ -772,8 +772,8 @@ bool WebProcessProxy::shouldTakeNearSuspendedAssertion() const
 #if USE(RUNNINGBOARD)
     if (m_pageMap.isEmpty()) {
         // The setting come from pages but this process has no page, we thus use the default
-        // setting value, which is true.
-        return true;
+        // setting value.
+        return defaultShouldTakeNearSuspendedAssertion();
     }
 
     for (auto& page : m_pageMap.values()) {