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-rw-r--r--Source/WebCore/css/CSSValue.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/Source/WebCore/css/CSSValue.h b/Source/WebCore/css/CSSValue.h
index e8053fe..a101c66 100644
--- a/Source/WebCore/css/CSSValue.h
+++ b/Source/WebCore/css/CSSValue.h
@@ -50,6 +50,8 @@ public:
virtual String cssText() const = 0;
void setCssText(const String&, ExceptionCode&) { } // FIXME: Not implemented.
+ virtual bool isMutableValue() const { return false; }
+
virtual bool isBorderImageValue() const { return false; }
virtual bool isCursorImageValue() const { return false; }
virtual bool isFontFamilyValue() const { return false; }