Get and return String by const-ref if used as rvalue

third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.cpp

Index: third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.cpp b/third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.cpp
index 3ee233593707304de1a1511dcd798c84ff548f0b..c62859279d720e37d4dd1d5c37d06fff1c39547b 100644
--- a/third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/modules/BooleanOrString.cpp
@@ -36,18 +36,18 @@ BooleanOrString BooleanOrString::fromBoolean(bool value) {
   return container;
 }
 
-String BooleanOrString::getAsString() const {
+const String& BooleanOrString::getAsString() const {
   DCHECK(isString());
   return m_string;
 }
 
-void BooleanOrString::setString(String value) {
+void BooleanOrString::setString(const String& value) {
   DCHECK(isNull());
   m_string = value;
   m_type = SpecificTypeString;
 }
 
-BooleanOrString BooleanOrString::fromString(String value) {
+BooleanOrString BooleanOrString::fromString(const String& value) {
   BooleanOrString container;
   container.setString(value);
   return container;