[WIP] WebFonts cache-aware timeout adaption

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

Index: third_party/WebKit/Source/core/css/CSSFontFaceSrcValue.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSFontFaceSrcValue.cpp b/third_party/WebKit/Source/core/css/CSSFontFaceSrcValue.cpp
index fd77f75d3d8b2a26c4ef4f56e41ff5706d0f2d70..0a2b8ff6db6f113304138d9c8476ecf2a106f106 100644
--- a/third_party/WebKit/Source/core/css/CSSFontFaceSrcValue.cpp
+++ b/third_party/WebKit/Source/core/css/CSSFontFaceSrcValue.cpp
@@ -35,6 +35,7 @@
 #include "core/fetch/ResourceFetcher.h"
 #include "core/loader/MixedContentChecker.h"
 #include "platform/CrossOriginAttributeValue.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #include "platform/fonts/FontCache.h"
 #include "platform/fonts/FontCustomPlatformData.h"
 #include "platform/weborigin/SecurityPolicy.h"
@@ -90,6 +91,8 @@ FontResource* CSSFontFaceSrcValue::fetch(Document* document) const {
   if (!m_fetched) {
     FetchRequest request(ResourceRequest(m_absoluteResource),
                          FetchInitiatorTypeNames::css);
+    request.setIsCacheAwareLoadingEnabled(
+        RuntimeEnabledFeatures::webFontsCacheAwareTimeoutAdaptationEnabled());
     request.setContentSecurityCheck(m_shouldCheckContentSecurityPolicy);
     SecurityOrigin* securityOrigin = document->getSecurityOrigin();
     setCrossOriginAccessControl(request, securityOrigin);