Don't check implicit flag for serializing background and -webkit-mask

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

Index: third_party/WebKit/Source/core/css/StylePropertySerializer.h
diff --git a/third_party/WebKit/Source/core/css/StylePropertySerializer.h b/third_party/WebKit/Source/core/css/StylePropertySerializer.h
index 9c130dd48c13e7433bc47024d3ccc53d656ac9ed..d4ecf27f64b6cd29a545896dece82f2dcb437f9a 100644
--- a/third_party/WebKit/Source/core/css/StylePropertySerializer.h
+++ b/third_party/WebKit/Source/core/css/StylePropertySerializer.h
@@ -83,7 +83,6 @@ class StylePropertySerializer {
         : m_value(property.value()),
           m_id(property.id()),
           m_isImportant(property.isImportant()),
-          m_isImplicit(property.isImplicit()),
           m_isInherited(property.isInherited()) {}
 
     // TODO(sashab): Make this take a const CSSValue&.
@@ -93,13 +92,11 @@ class StylePropertySerializer {
         : m_value(value),
           m_id(id),
           m_isImportant(isImportant),
-          m_isImplicit(value->isImplicitInitialValue()),
           m_isInherited(value->isInheritedValue()) {}
 
     CSSPropertyID id() const { return m_id; }
     const CSSValue* value() const { return m_value; }
     bool isImportant() const { return m_isImportant; }
-    bool isImplicit() const { return m_isImplicit; }
     bool isInherited() const { return m_isInherited; }
     bool isValid() const { return m_value; }
 
@@ -107,7 +104,6 @@ class StylePropertySerializer {
     Member<const CSSValue> m_value;
     CSSPropertyID m_id;
     bool m_isImportant;
-    bool m_isImplicit;
     bool m_isInherited;
   };
 
@@ -125,7 +121,6 @@ class StylePropertySerializer {
     bool shouldProcessPropertyAt(unsigned index) const;
     int findPropertyIndex(CSSPropertyID) const;
     const CSSValue* getPropertyCSSValue(CSSPropertyID) const;
-    bool isPropertyImplicit(CSSPropertyID) const;
 
     DECLARE_TRACE();