Move more parts of stack trace formatting to runtime.

src/messages.h

Index: src/messages.h
diff --git a/src/messages.h b/src/messages.h
index 7c7b26f238936d05c039b8e15d34db1cceb8e659..7e18beb96720fc1efa697797d065a8975be33667 100644
--- a/src/messages.h
+++ b/src/messages.h
@@ -96,6 +96,7 @@ class CallSite {
   Handle<Object> GetFileName(Isolate* isolate);
   Handle<Object> GetFunctionName(Isolate* isolate);
   Handle<Object> GetScriptNameOrSourceUrl(Isolate* isolate);
+  Handle<Object> GetMethodName(Isolate* isolate);
   // Return 1-based line number, including line offset.
   int GetLineNumber(Isolate* isolate);
   // Return 1-based column number, including column offset if first line.
@@ -103,6 +104,7 @@ class CallSite {
   bool IsNative(Isolate* isolate);
   bool IsToplevel(Isolate* isolate);
   bool IsEval(Isolate* isolate);
+  bool IsConstructor(Isolate* isolate);
 
  private:
   Handle<Object> receiver_;