Bug 1415352: Part 1a - Pass subject principal through to ParseAttribute. r=bz

This is necessary in order to parse style attributes using the subject
principal of the caller, rather than defaulting to the page principal.

MozReview-Commit-ID: GIshajQ28la

dom/html/HTMLVideoElement.cpp

@@ -86,6 +86,7 @@ bool
 HTMLVideoElement::ParseAttribute(int32_t aNamespaceID,
                                  nsAtom* aAttribute,
                                  const nsAString& aValue,
+                                 nsIPrincipal* aMaybeScriptedPrincipal,
                                  nsAttrValue& aResult)
 {
    if (aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height) {
@@ -93,7 +94,7 @@ HTMLVideoElement::ParseAttribute(int32_t aNamespaceID,
    }
 
    return HTMLMediaElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
-                                           aResult);
+                                           aMaybeScriptedPrincipal, aResult);
 }
 
 void