Prevent FontResource load limit timers from restarting during loading

third_party/WebKit/Source/core/fetch/FontResource.h

 /*
  * Copyright (C) 2007, 2008 Apple 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 36 matching lines @@
   using ClientType = FontResourceClient;
 
   static FontResource* fetch(FetchRequest&, ResourceFetcher*);
   ~FontResource() override;
 
   void didAddClient(ResourceClient*) override;
 
   void setRevalidatingRequest(const ResourceRequest&) override;
 
   void allClientsAndObserversRemoved() override;
-  void startLoadLimitTimersIfNeeded();
+  void startLoadLimitTimers();
 
   void setCORSFailed() override { m_corsFailed = true; }
   bool isCORSFailed() const { return m_corsFailed; }
   String otsParsingMessage() const { return m_otsParsingMessage; }
 
   bool ensureCustomFontData();
   FontPlatformData platformDataFromCustomData(
       float size,
       bool bold,
       bool italic,
@@ skipping 15 matching lines @@
   void checkNotify() override;
   void fontLoadShortLimitCallback(TimerBase*);
   void fontLoadLongLimitCallback(TimerBase*);
 
   enum LoadLimitState { UnderLimit, ShortLimitExceeded, LongLimitExceeded };
 
   std::unique_ptr<FontCustomPlatformData> m_fontData;
   String m_otsParsingMessage;
   LoadLimitState m_loadLimitState;
   bool m_corsFailed;
+  bool m_isLoadLimitTimersStarted;
   Timer<FontResource> m_fontLoadShortLimitTimer;
   Timer<FontResource> m_fontLoadLongLimitTimer;
 
   friend class MemoryCache;
 };
 
 DEFINE_RESOURCE_TYPE_CASTS(Font);
 
 class FontResourceClient : public ResourceClient {
  public:
   ~FontResourceClient() override {}
   static bool isExpectedType(ResourceClient* client) {
     return client->getResourceClientType() == FontType;
   }
   ResourceClientType getResourceClientType() const final { return FontType; }
   virtual void fontLoadShortLimitExceeded(FontResource*) {}
   virtual void fontLoadLongLimitExceeded(FontResource*) {}
 };
 
 }  // namespace blink
 
 #endif