reverted nsFind changes as it caused crash.

embedding/components/find/nsFind.cpp

@@ -853,7 +853,7 @@ nsFind::ResetAll()
 // Take nodes out of the tree with NextNode, until null (NextNode will return 0
 // at the end of our range).
 NS_IMETHODIMP
-nsFind::Find(const nsAString& aPatText, nsIDOMRange* aSearchRange,
+nsFind::Find(const char16_t* aPatText, nsIDOMRange* aSearchRange,
              nsIDOMRange* aStartPoint, nsIDOMRange* aEndPoint,
              nsIDOMRange** aRangeRet)
 {
@@ -870,6 +870,10 @@ nsFind::Find(const nsAString& aPatText, nsIDOMRange* aSearchRange,
   NS_ENSURE_ARG_POINTER(aRangeRet);
   *aRangeRet = 0;
 
+  if (!aPatText) {
+    return NS_ERROR_NULL_POINTER;
+  }
+
   ResetAll();
 
   nsAutoString patAutoStr(aPatText);

embedding/components/find/nsIFind.idl

@@ -34,6 +34,6 @@ interface nsIFind : nsISupports
    *                     end (forward) or start (backward).
    * @retval             A range spanning the match that was found (or null).
    */
-  nsIDOMRange Find(in AString aPatText, in nsIDOMRange aSearchRange,
+  nsIDOMRange Find(in wstring aPatText, in nsIDOMRange aSearchRange,
                    in nsIDOMRange aStartPoint, in nsIDOMRange aEndPoint);
 };

embedding/components/find/nsWebBrowserFind.cpp

@@ -756,7 +756,7 @@ nsWebBrowserFind::SearchInFrame(nsIDOMWindow* aWindow, bool aWrapping,
 
   NS_ENSURE_SUCCESS(rv, rv);
 
-  rv = find->Find(mSearchString, searchRange, startPt, endPt,
+  rv = find->Find(mSearchString.get(), searchRange, startPt, endPt,
                   getter_AddRefs(foundRange));
 
   if (NS_SUCCEEDED(rv) && foundRange) {

toolkit/components/typeaheadfind/nsTypeAheadFind.cpp

@@ -396,7 +396,7 @@ nsTypeAheadFind::FindItNow(nsIPresShell *aPresShell, bool aIsLinksOnly,
 
   while (true) {    // ----- Outer while loop: go through all docs -----
     while (true) {  // === Inner while loop: go through a single doc ===
-      mFind->Find(mTypeAheadBuffer, mSearchRange, mStartPointRange,
+      mFind->Find(mTypeAheadBuffer.get(), mSearchRange, mStartPointRange,
                   mEndPointRange, getter_AddRefs(returnRange));
       
       if (!returnRange)