tracing: Report ResourceClients and the reason for not deletable for web-caches

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef RemoteFontFaceSource_h
 #define RemoteFontFaceSource_h
 
 #include "core/css/CSSFontFaceSource.h"
 #include "core/fetch/FontResource.h"
 #include "core/fetch/ResourcePtr.h"
@@ skipping 11 matching lines @@
     FontResource* resource() override { return m_font.get(); }
     bool isLoading() const override;
     bool isLoaded() const override;
     bool isValid() const override;
 
     void beginLoadIfNeeded() override;
 
     void didStartFontLoad(FontResource*) override;
     void fontLoaded(FontResource*) override;
     void fontLoadWaitLimitExceeded(FontResource*) override;
+    String debugName() const override { return "RemoteFontFaceSource"; }
 
     // For UMA reporting
     bool hadBlankText() override { return m_histograms.hadBlankText(); }
     void paintRequested() { m_histograms.fallbackFontPainted(); }
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     PassRefPtr<SimpleFontData> createFontData(const FontDescription&) override;
     PassRefPtr<SimpleFontData> createLoadingFallbackFontData(const FontDescription&);
@@ skipping 16 matching lines @@
     };
 
     ResourcePtr<FontResource> m_font;
     RefPtrWillBeMember<FontLoader> m_fontLoader;
     FontLoadHistograms m_histograms;
 };
 
 } // namespace blink
 
 #endif