Cherry-pick b6a2c10. rdar://123640341

    Preload restricted window opener data
    https://bugs.webkit.org/show_bug.cgi?id=270106
    rdar://123640341

    Reviewed by Wenson Hsieh.

    The first call to check for the restricted opener type for a domain currently always claims that the
    domain should have an unrestricted opener. This is because we load the list of restricted openers
    from WebPrivacy both lazily and asynchronously.

    To make it much more likely that the first call has up-to-date data, we now load the data in
    `WebProcessPool::didReachGoodTimeToPrewarm`.

    * Source/WebKit/UIProcess/WebProcessPool.cpp:
    (WebKit::loadRestrictedOpenerTypeDataIfNeeded):
    (WebKit::WebProcessPool::didReachGoodTimeToPrewarm):

    Canonical link: https://commits.webkit.org/275365@main

Canonical link: https://commits.webkit.org/274941.47@safari-7619.1.5-branch

Source/WebKit/UIProcess/WebProcessPool.cpp

@@ -1368,8 +1368,17 @@ void WebProcessPool::postMessageToInjectedBundle(const String& messageName, API:
     }
 }
 
+static void loadRestrictedOpenerTypeDataIfNeeded()
+{
+#if ENABLE(ADVANCED_PRIVACY_PROTECTIONS)
+    RestrictedOpenerDomainsController::shared();
+#endif
+}
+
 void WebProcessPool::didReachGoodTimeToPrewarm()
 {
+    loadRestrictedOpenerTypeDataIfNeeded();
+
     if (!configuration().isAutomaticProcessWarmingEnabled() || !configuration().processSwapsOnNavigation() || usesSingleWebProcess())
         return;