Current work-in-progress crbug.com/567021

third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp b/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
index 06425ebed5548a9bff6f227129aa1601dbca009c..a310f211ba281e593ee56750b6d7c830431d63f9 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
@@ -554,6 +554,9 @@ StyleRuleViewport* CSSParserImpl::consumeViewportRule(CSSParserTokenRange prelud
         m_observerWrapper->observer().endRuleBody(endOffset);
     }
 
+    if (m_styleSheet)
+        m_styleSheet->setHasViewportRule();
+
     consumeDeclarationList(block, StyleRule::Viewport);
     return StyleRuleViewport::create(createStylePropertySet(m_parsedProperties, CSSViewportRuleMode));
 }
@@ -573,7 +576,7 @@ StyleRuleFontFace* CSSParserImpl::consumeFontFaceRule(CSSParserTokenRange prelud
     }
 
     if (m_styleSheet)
-        m_styleSheet->setHasFontFaceRule(true);
+        m_styleSheet->setHasFontFaceRule();
 
     consumeDeclarationList(block, StyleRule::FontFace);
     return StyleRuleFontFace::create(createStylePropertySet(m_parsedProperties, m_context.mode()));