1 files changed, 16 insertions, 1 deletions
diff --git a/dom/base/nsStyledElement.cpp b/dom/base/nsStyledElement.cpp
index e3d8dfe57..8cd448d47 100644
--- a/dom/base/nsStyledElement.cpp
+++ b/dom/base/nsStyledElement.cpp
@@ -40,7 +40,6 @@ nsStyledElement::ParseAttribute(int32_t aNamespaceID,
                                 nsAttrValue& aResult)
 {
   if (aAttribute == nsGkAtoms::style && aNamespaceID == kNameSpaceID_None) {
-    SetMayHaveStyle();
     ParseStyleAttribute(aValue, aResult, false);
     return true;
   }
@@ -50,6 +49,22 @@ nsStyledElement::ParseAttribute(int32_t aNamespaceID,
 }
 
 nsresult
+nsStyledElement::BeforeSetAttr(int32_t aNamespaceID, nsIAtom* aName,
+                               const nsAttrValueOrString* aValue, bool aNotify)
+{
+  if (aNamespaceID == kNameSpaceID_None) {
+    if (aName == nsGkAtoms::style) {
+      if (aValue) {
+        SetMayHaveStyle();
+      }
+    }
+  }
+
+  return nsStyledElementBase::BeforeSetAttr(aNamespaceID, aName, aValue,
+                                            aNotify);
+}
+
+nsresult
 nsStyledElement::SetInlineStyleDeclaration(DeclarationBlock* aDeclaration,
                                            const nsAString* aSerialized,
                                            bool aNotify)