Preload tokens even if a <meta> csp tag is found

third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.h

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 30 matching lines @@
 #include "core/html/parser/HTMLSourceTracker.h"
 #include "core/html/parser/HTMLToken.h"
 #include "core/html/parser/HTMLTokenizer.h"
 #include "core/html/parser/HTMLTreeBuilderSimulator.h"
 #include "core/html/parser/ParserSynchronizationPolicy.h"
 #include "core/html/parser/TextResourceDecoder.h"
 #include "core/html/parser/XSSAuditor.h"
 #include "core/html/parser/XSSAuditorDelegate.h"
 #include "platform/text/SegmentedString.h"
 #include "wtf/Deque.h"
+#include "wtf/Optional.h"
 #include "wtf/RefPtr.h"
 #include "wtf/WeakPtr.h"
 #include "wtf/text/TextPosition.h"
 #include <memory>
 
 namespace blink {
 
 class BackgroundHTMLParser;
 class CompactHTMLToken;
 class Document;
@@ skipping 45 matching lines @@
         PreloadRequestStream preloads;
         ViewportDescriptionWrapper viewport;
         XSSInfoStream xssInfos;
         HTMLTokenizer::State tokenizerState;
         HTMLTreeBuilderSimulator::State treeBuilderState;
         HTMLInputCheckpoint inputCheckpoint;
         TokenPreloadScannerCheckpoint preloadScannerCheckpoint;
         bool startingScript;
         // Indices into |tokens|.
         Vector<int> likelyDocumentWriteScriptIndices;
+        // Index into |tokens| of the last <meta> csp tag in |tokens|. Preloads
+        // will be deferred until this token is parsed.
+        WTF::Optional<int> pendingCSPMetaTokenIndex;
     };
     void notifyPendingTokenizedChunks();
     void didReceiveEncodingDataFromBackgroundParser(const DocumentEncodingData&);
 
     void appendBytes(const char* bytes, size_t length) override;
     void flush() final;
     void setDecoder(std::unique_ptr<TextResourceDecoder>) final;
 
 protected:
     void insert(const SegmentedString&) final;
@@ skipping 53 matching lines @@
 
     bool shouldUseThreading() const { return m_shouldUseThreading; }
 
     bool isParsingFragment() const;
     bool isScheduledForResume() const;
     bool inPumpSession() const { return m_pumpSessionNestingLevel > 0; }
     bool shouldDelayEnd() const { return inPumpSession() || isWaitingForScripts() || isScheduledForResume() || isExecutingScript(); }
 
     std::unique_ptr<HTMLPreloadScanner> createPreloadScanner();
 
-    int preloadInsertion(const SegmentedString& source);
+    void fetchQueuedPreloads();
+
     void evaluateAndPreloadScriptForDocumentWrite(const String& source);
 
     // Temporary enum for the ParseHTMLOnMainThread experiment. This is used to
     // annotate whether a given task should post a task or not on the main
     // thread if the lookahead parser is living on the main thread.
     enum LookaheadParserTaskSynchrony {
         Synchronous,
         Asynchronous,
     };
 
@@ skipping 28 matching lines @@
     std::unique_ptr<TokenizedChunk> m_lastChunkBeforeScript;
     Deque<std::unique_ptr<TokenizedChunk>> m_speculations;
     WeakPtrFactory<HTMLDocumentParser> m_weakFactory;
     WeakPtr<BackgroundHTMLParser> m_backgroundParser;
     Member<HTMLResourcePreloader> m_preloader;
     PreloadRequestStream m_queuedPreloads;
     Vector<String> m_queuedDocumentWriteScripts;
     RefPtr<TokenizedChunkQueue> m_tokenizedChunkQueue;
     std::unique_ptr<DocumentWriteEvaluator> m_evaluator;
 
+    // If this is non-null, then there is a meta CSP token somewhere in the
+    // speculation buffer. Preloads will be deferred until a token matching this
+    // pointer is parsed and the CSP policy is applied. Note that this pointer
+    // tracks the *last* meta token in the speculation buffer, so it
+    // overestimates how long to defer preloads. This is for simplicity, as the
+    // alternative would require keeping track of token positions of preload
+    // requests.
+    CompactHTMLToken* m_pendingCSPMetaToken;
+
     bool m_shouldUseThreading;
     bool m_endWasDelayed;
     bool m_haveBackgroundParser;
     bool m_tasksWereSuspended;
     unsigned m_pumpSessionNestingLevel;
     unsigned m_pumpSpeculationsSessionNestingLevel;
     bool m_isParsingAtLineNumber;
     bool m_triedLoadingLinkHeaders;
 };
 
 } // namespace blink
 
 #endif