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-rw-r--r--dom/webidl/CSSStyleDeclaration.webidl3
1 files changed, 3 insertions, 0 deletions
diff --git a/dom/webidl/CSSStyleDeclaration.webidl b/dom/webidl/CSSStyleDeclaration.webidl
index 76050b75a0..8e38957412 100644
--- a/dom/webidl/CSSStyleDeclaration.webidl
+++ b/dom/webidl/CSSStyleDeclaration.webidl
@@ -21,6 +21,9 @@ interface CSSStyleDeclaration {
[Throws, ChromeOnly]
sequence<UTF8String> getCSSImageURLs(UTF8String property);
+ [ChromeOnly]
+ readonly attribute float usedFontSize;
+
UTF8String getPropertyValue(UTF8String property);
UTF8String getPropertyPriority(UTF8String property);
[CEReactions, NeedsSubjectPrincipal=NonSystem, Throws]