[WIP] WebFonts cache-aware timeout adaption

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

Index: third_party/WebKit/Source/core/fetch/FontResource.h
diff --git a/third_party/WebKit/Source/core/fetch/FontResource.h b/third_party/WebKit/Source/core/fetch/FontResource.h
index e83ab315a525782642b34205c432c2d1cc84114f..c3676fe6d706f3dd1f4fa646bea5279e2d56b1ac 100644
--- a/third_party/WebKit/Source/core/fetch/FontResource.h
+++ b/third_party/WebKit/Source/core/fetch/FontResource.h
@@ -67,6 +67,10 @@ class CORE_EXPORT FontResource final : public Resource {
       bool italic,
       FontOrientation = FontOrientation::Horizontal);
 
+  // Calls to addClient() and removeClient() is forbidden in this callback to
+  // prevent potential race issues.
+  void willReloadAfterDiskCacheMiss() override;
+
  private:
   class FontResourceFactory : public ResourceFactory {
    public:
@@ -112,6 +116,7 @@ class FontResourceClient : public ResourceClient {
   ResourceClientType getResourceClientType() const final { return FontType; }
   virtual void fontLoadShortLimitExceeded(FontResource*) {}
   virtual void fontLoadLongLimitExceeded(FontResource*) {}
+  virtual void willReloadAfterDiskCacheMiss(const FontResource*) {}
 };
 
 }  // namespace blink