[stubs] Don't pass name to Load/StoreGlobalViaContext stubs.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 46bb35ae8f9fab01007ce77bb5186f7dbb58290f..1782845d905f776557229dc094f51492d5b2d234 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -375,8 +375,7 @@ LOperand* LPlatformChunk::GetNextSpillSlot(RegisterKind kind) {
 
 
 void LLoadGlobalViaContext::PrintDataTo(StringStream* stream) {
-  stream->Add(String::cast(*name())->ToCString().get());
-  stream->Add(" depth:%d slot:%d", depth(), slot_index());
+  stream->Add("depth:%d slot:%d", depth(), slot_index());
 }
 
 
@@ -399,10 +398,8 @@ void LStoreNamedGeneric::PrintDataTo(StringStream* stream) {
 
 
 void LStoreGlobalViaContext::PrintDataTo(StringStream* stream) {
-  stream->Add(String::cast(*name())->ToCString().get());
-  stream->Add(" <- ");
+  stream->Add("depth:%d slot:%d <- ", depth(), slot_index());
   value()->PrintTo(stream);
-  stream->Add(" depth:%d slot:%d", depth(), slot_index());
 }