FontLoadHistograms: move maySetDataSource() impl out of header

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

 // 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.
 
 #include "core/css/RemoteFontFaceSource.h"
 
 #include "core/css/CSSCustomFontData.h"
 #include "core/css/CSSFontFace.h"
 #include "core/css/CSSFontSelector.h"
 #include "core/dom/Document.h"
@@ skipping 267 matching lines @@
         int duration = static_cast<int>(currentTimeMS() - m_loadStartTime);
         recordLoadTimeHistogram(font, duration);
 
         enum { CORSFail, CORSSuccess, CORSEnumMax };
         int corsValue = font->isCORSFailed() ? CORSFail : CORSSuccess;
         DEFINE_STATIC_LOCAL(EnumerationHistogram, corsHistogram, ("WebFont.CORSSuccess", CORSEnumMax));
         corsHistogram.count(corsValue);
     }
 }
 
+void RemoteFontFaceSource::FontLoadHistograms::maySetDataSource(DataSource dataSource)
+{
+    if (m_dataSource != FromUnknown)
+        return;
+    // Classify as memory cache hit if |m_loadStartTime| is not set, i.e.
+    // this RemoteFontFaceSource instance didn't trigger FontResource
+    // loading.
+    if (m_loadStartTime == 0)
+        m_dataSource = FromMemoryCache;
+    else
+        m_dataSource = dataSource;
+}
+
 void RemoteFontFaceSource::FontLoadHistograms::recordLoadTimeHistogram(const FontResource* font, int duration)
 {
     CHECK_NE(FromUnknown, m_dataSource);
 
     if (font->errorOccurred()) {
         DEFINE_STATIC_LOCAL(CustomCountHistogram, loadErrorHistogram, ("WebFont.DownloadTime.LoadError", 0, 10000, 50));
         DEFINE_STATIC_LOCAL(CustomCountHistogram, missedCacheLoadErrorHistogram, ("WebFont.MissedCache.DownloadTime.LoadError", 0, 10000, 50));
         loadErrorHistogram.count(duration);
         if (m_dataSource == FromNetwork)
             missedCacheLoadErrorHistogram.count(duration);
@@ skipping 72 matching lines @@
         return Miss;
     case FromUnknown:
         // Fall through.
     default:
         NOTREACHED();
     }
     return Miss;
 }
 
 } // namespace blink