[WIP] WebFonts cache-aware timeout adaption

third_party/WebKit/Source/core/css/RemoteFontFaceSource.h

Index: third_party/WebKit/Source/core/css/RemoteFontFaceSource.h
diff --git a/third_party/WebKit/Source/core/css/RemoteFontFaceSource.h b/third_party/WebKit/Source/core/css/RemoteFontFaceSource.h
index fb76fee8c0b7fca48575fa6c930769f05f8be3b1..481230b1a3ca4eae40c217b8a0cb3b97ec8bf416 100644
--- a/third_party/WebKit/Source/core/css/RemoteFontFaceSource.h
+++ b/third_party/WebKit/Source/core/css/RemoteFontFaceSource.h
@@ -44,6 +44,9 @@ class RemoteFontFaceSource final : public CSSFontFaceSource,
   void notifyFinished(Resource*) override;
   void fontLoadShortLimitExceeded(FontResource*) override;
   void fontLoadLongLimitExceeded(FontResource*) override;
+
+  void willReloadAfterDiskCacheMiss(const FontResource*) override;
+
   String debugName() const override { return "RemoteFontFaceSource"; }
 
   bool isBlank() override { return m_period == BlockPeriod; }
@@ -101,9 +104,11 @@ class RemoteFontFaceSource final : public CSSFontFaceSource,
     DataSource m_dataSource;
   };
 
+  void didBecomeVisibleFallback();
   void switchToSwapPeriod();
   void switchToFailurePeriod();
   bool shouldTriggerWebFontsIntervention();
+  bool shouldUseInvisibleFallback() const;
 
   Member<FontResource> m_font;
   Member<CSSFontSelector> m_fontSelector;