Remove the concept of pendingScripts from HTMLScriptRunner

sky/engine/core/html/parser/BackgroundHTMLParser.h

Index: sky/engine/core/html/parser/BackgroundHTMLParser.h
diff --git a/sky/engine/core/html/parser/BackgroundHTMLParser.h b/sky/engine/core/html/parser/BackgroundHTMLParser.h
index aed7c04786b5869edef8532d3a3c47beb6dcc1e1..fa13ba22a95e839b467509308b53707728bbf282 100644
--- a/sky/engine/core/html/parser/BackgroundHTMLParser.h
+++ b/sky/engine/core/html/parser/BackgroundHTMLParser.h
@@ -66,7 +66,14 @@ private:
     void markEndOfFile();
     void pumpTokenizer();
     void sendTokensToMainThread();
-    bool updateTokenizerState(const CompactHTMLToken& token);
+
+    enum ContinueBehavior {
+        ContinueParsing,
+        SendTokensIncludingLast,
+        SendTokensExceptingLast,
+    };
+
+    ContinueBehavior updateTokenizerState(const CompactHTMLToken& token);
 
     enum State {
         InitialState,