ES6 symbols: Allow symbols as property names

src/log.h

Index: src/log.h
diff --git a/src/log.h b/src/log.h
index 093906c3848c2966bf2defd349cb19bdabe6b14c..a7664c9a659c9034b28073601e426a69831f7dde 100644
--- a/src/log.h
+++ b/src/log.h
@@ -201,7 +201,7 @@ class Logger {
 
   // Emits an event that an undefined property was read from an
   // object.
-  void SuspectReadEvent(String* name, Object* obj);
+  void SuspectReadEvent(Name* name, Object* obj);
 
   // Emits an event when a message is put on or read from a debugging queue.
   // DebugTag lets us put a call-site specific label on the event.
@@ -222,22 +222,22 @@ class Logger {
 
   // ==== Events logged by --log-code. ====
   // Emits a code event for a callback function.
-  void CallbackEvent(String* name, Address entry_point);
-  void GetterCallbackEvent(String* name, Address entry_point);
-  void SetterCallbackEvent(String* name, Address entry_point);
+  void CallbackEvent(Name* name, Address entry_point);
+  void GetterCallbackEvent(Name* name, Address entry_point);
+  void SetterCallbackEvent(Name* name, Address entry_point);
   // Emits a code create event.
   void CodeCreateEvent(LogEventsAndTags tag,
                        Code* code, const char* source);
   void CodeCreateEvent(LogEventsAndTags tag,
-                       Code* code, String* name);
+                       Code* code, Name* name);
   void CodeCreateEvent(LogEventsAndTags tag,
                        Code* code,
                        SharedFunctionInfo* shared,
-                       String* name);
+                       Name* name);
   void CodeCreateEvent(LogEventsAndTags tag,
                        Code* code,
                        SharedFunctionInfo* shared,
-                       String* source, int line);
+                       Name* source, int line);
   void CodeCreateEvent(LogEventsAndTags tag, Code* code, int args_count);
   void CodeMovingGCEvent();
   // Emits a code create event for a RegExp.
@@ -368,7 +368,7 @@ class Logger {
 
   // Emits callback event messages.
   void CallbackEventInternal(const char* prefix,
-                             const char* name,
+                             Name* name,
                              Address entry_point);
 
   // Internal configurable move event.