Bug 1157898 part 1. Make code of the form "return rv.ErrorCode();" where rv is an ErrorResult use StealNSResult instead. r=peterv

This patch was generated with the following command:

  find . -name "*.h" -o -name "*.cpp" | xargs perl -pi -e 's/return ([a-zA-Z0-9]+)\.ErrorCode\(\);/return \1.StealNSResult();/'

dom/html/HTMLScriptElement.cpp

@@ -121,7 +121,7 @@ HTMLScriptElement::SetText(const nsAString& aValue)
 {
   ErrorResult rv;
   SetText(aValue, rv);
-  return rv.ErrorCode();
+  return rv.StealNSResult();
 }
 
 void
@@ -198,7 +198,7 @@ HTMLScriptElement::SetAsync(bool aValue)
 {
   ErrorResult rv;
   SetAsync(aValue, rv);
-  return rv.ErrorCode();
+  return rv.StealNSResult();
 }
 
 void