--- a/dom/base/nsDOMWindowUtils.cpp
+++ b/dom/base/nsDOMWindowUtils.cpp
@@ -1814,27 +1814,24 @@ nsDOMWindowUtils::GetIMEStatus(uint32_t 
     return NS_ERROR_FAILURE;
 
   InputContext context = widget->GetInputContext();
   *aState = static_cast<uint32_t>(context.mIMEState.mEnabled);
   return NS_OK;
 }
 
 NS_IMETHODIMP
-nsDOMWindowUtils::GetFocusedInputType(char** aType)
+nsDOMWindowUtils::GetFocusedInputType(nsAString& aType)
 {
-  NS_ENSURE_ARG_POINTER(aType);
-
   nsCOMPtr<nsIWidget> widget = GetWidget();
   if (!widget) {
     return NS_ERROR_FAILURE;
   }
 
-  InputContext context = widget->GetInputContext();
-  *aType = ToNewCString(context.mHTMLInputType);
+  aType = widget->GetInputContext().mHTMLInputType;
   return NS_OK;
 }
 
 NS_IMETHODIMP
 nsDOMWindowUtils::GetViewId(nsIDOMElement* aElement, nsViewID* aResult)
 {
   nsCOMPtr<nsIContent> content = do_QueryInterface(aElement);
   if (content && nsLayoutUtils::FindIDFor(content, aResult)) {

--- a/dom/interfaces/base/nsIDOMWindowUtils.idl
+++ b/dom/interfaces/base/nsIDOMWindowUtils.idl
@@ -1507,17 +1507,17 @@ interface nsIDOMWindowUtils : nsISupport
   AString getUnanimatedComputedStyle(in nsIDOMElement aElement,
                                      in AString aPseudoElement,
                                      in AString aProperty,
                                      in long aFlushType);
 
   /**
    * Get the type of the currently focused html input, if any.
    */
-  readonly attribute string focusedInputType;
+  readonly attribute AString focusedInputType;
 
   /**
    * Find the view ID for a given element. This is the reverse of
    * findElementWithViewId().
    */
   nsViewID getViewId(in nsIDOMElement aElement);
 
   /**