Change FontFaceSet#check() behavior when no matched font-face

Source/core/css/CSSFontSelector.cpp

Index: Source/core/css/CSSFontSelector.cpp
diff --git a/Source/core/css/CSSFontSelector.cpp b/Source/core/css/CSSFontSelector.cpp
index 76f5734cd3ddb15673a2eca3e5d25e809ef547e6..38cdcb53efaf2792d85d0f12fad2e85ff5d5241c 100644
--- a/Source/core/css/CSSFontSelector.cpp
+++ b/Source/core/css/CSSFontSelector.cpp
@@ -149,6 +149,14 @@ void CSSFontSelector::willUseFontData(const FontDescription& fontDescription, co
         face->willUseFontData(fontDescription, character);
 }
 
+bool CSSFontSelector::isPlatformFontAvailable(const FontDescription& fontDescription, const AtomicString& passedFamily)
+{
+    AtomicString family = familyNameFromSettings(m_genericFontFamilySettings, fontDescription, passedFamily);
+    if (family.isEmpty())
+        family = passedFamily;
+    return FontCache::fontCache()->isPlatformFontAvailable(fontDescription, family);
+}
+
 #if !ENABLE(OILPAN)
 void CSSFontSelector::clearDocument()
 {