StringTable::LookupKey() and all callers handlified.

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index f29aac4aa8fee8dd43d48712bf562040e44f0f6a..a19f297c00f1b859491a15406ab5040aac28bf05 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -81,6 +81,8 @@ class Factory V8_FINAL {
   // Create an empty TypeFeedbackInfo.
   Handle<TypeFeedbackInfo> NewTypeFeedbackInfo();
 
+  // Finds the internalized copy for string in the string table.
+  // If not found, a new string is added to the table and returned.
   Handle<String> InternalizeUtf8String(Vector<const char> str);
   Handle<String> InternalizeUtf8String(const char* str) {
     return InternalizeUtf8String(CStrVector(str));
@@ -165,7 +167,9 @@ class Factory V8_FINAL {
       int length,
       PretenureFlag pretenure = NOT_TENURED);
 
-  Handle<String> LookupSingleCharacterStringFromCode(uint32_t index);
+  // Creates a single character string where the character has given code.
+  // A cache is used for ASCII codes.
+  Handle<String> LookupSingleCharacterStringFromCode(uint32_t code);
 
   // Create a new cons string object which consists of a pair of strings.
   MUST_USE_RESULT MaybeHandle<String> NewConsString(Handle<String> left,
@@ -575,6 +579,10 @@ class Factory V8_FINAL {
   INTERNALIZED_STRING_LIST(STRING_ACCESSOR)
 #undef STRING_ACCESSOR
 
+  inline void set_string_table(Handle<StringTable> table) {
+    isolate()->heap()->set_string_table(*table);
+  }
+
   Handle<String> hidden_string() {
     return Handle<String>(&isolate()->heap()->hidden_string_);
   }