StringTable::Lookup*IfExist() handlified.

src/scopeinfo.cc

Index: src/scopeinfo.cc
diff --git a/src/scopeinfo.cc b/src/scopeinfo.cc
index eaf9964b16f4a2e75b159f1ef3a1d13841aedb88..a6a2889432407462df226afec6b95e71feae0362 100644
--- a/src/scopeinfo.cc
+++ b/src/scopeinfo.cc
@@ -436,14 +436,14 @@ void ContextSlotCache::Update(Handle<Object> data,
                               VariableMode mode,
                               InitializationFlag init_flag,
                               int slot_index) {
-  String* internalized_name;
+  Handle<String> internalized_name;
   ASSERT(slot_index > kNotFound);
-  if (name->GetIsolate()->heap()->InternalizeStringIfExists(
-          *name, &internalized_name)) {
-    int index = Hash(*data, internalized_name);
+  if (StringTable::InternalizeStringIfExists(name->GetIsolate(), name).
+      ToHandle(&internalized_name)) {
+    int index = Hash(*data, *internalized_name);
     Key& key = keys_[index];
     key.data = *data;
-    key.name = internalized_name;
+    key.name = *internalized_name;
     // Please note value only takes a uint as index.
     values_[index] = Value(mode, init_flag, slot_index - kNotFound).raw();
 #ifdef DEBUG
@@ -465,9 +465,9 @@ void ContextSlotCache::ValidateEntry(Handle<Object> data,
                                      VariableMode mode,
                                      InitializationFlag init_flag,
                                      int slot_index) {
-  String* internalized_name;
-  if (name->GetIsolate()->heap()->InternalizeStringIfExists(
-          *name, &internalized_name)) {
+  Handle<String> internalized_name;
+  if (StringTable::InternalizeStringIfExists(name->GetIsolate(), name).
+      ToHandle(&internalized_name)) {
     int index = Hash(*data, *name);
     Key& key = keys_[index];
     ASSERT(key.data == *data);