[hydrogen] optimize switch with string clauses

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index ae623678deab69a900c5e7903998f5062963806c..bf09dd53bbd69cdcf23ae55a1082a693e67e08e3 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1325,6 +1325,13 @@ void HCompareGeneric::PrintDataTo(StringStream* stream) {
 }
 
 
+void HStringCompareAndBranch::PrintDataTo(StringStream* stream) {
+  stream->Add(Token::Name(token()));
+  stream->Add(" ");
+  HControlInstruction::PrintDataTo(stream);
+}
+
+
 void HCompareIDAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add(Token::Name(token()));
   stream->Add(" ");