Bug 409310 - Make SVG image viewing in page info more robust. r=mano,sr=bzbarsky,a1.9=mconnor

browser/base/content/pageinfo/pageInfo.js

@@ -611,8 +611,12 @@ function grabAll(elem)
              (elem.hasAttribute("alt")) ? elem.alt : gStrings.notSet, elem, false);
 #ifdef MOZ_SVG
   else if (elem instanceof SVGImageElement) {
+    try {
+      // Note: makeURLAbsolute will throw if either the baseURI is not a valid URI
+      //       or the URI formed from the baseURI and the URL is not a valid URI
       var href = makeURLAbsolute(elem.baseURI, elem.href.baseVal);
       addImage(href, gStrings.mediaImg, "", elem, false);
+    } catch (e) { }
   }
 #endif
   else if (elem instanceof HTMLLinkElement) {

browser/base/content/utilityOverlay.js

@@ -497,7 +497,8 @@ function isElementVisible(aElement)
 
 function makeURLAbsolute(aBase, aUrl)
 {
-  return IO.newURI(IO.newURI(aBase).resolve(aUrl)).spec;
+  // Note:  IO.newURI(aUri) will throw if aUri is not a valid URI
+  return IO.newURI(aUrl, null, IO.newURI(aBase)).spec;
 }
 
 function getBrowserFromContentWindow(aContentWindow)