Adds C++ API for retrieving a stack trace without running JavaScript

src/api.h

Index: src/api.h
===================================================================
--- src/api.h	(revision 4556)
+++ src/api.h	(working copy)
@@ -192,6 +192,10 @@
       v8::internal::Handle<v8::internal::Proxy> obj);
   static inline Local<Message> MessageToLocal(
       v8::internal::Handle<v8::internal::Object> obj);
+  static inline Local<StackTrace> StackTraceToLocal(
+      v8::internal::Handle<v8::internal::JSArray> obj);
+  static inline Local<StackFrame> StackFrameToLocal(
+      v8::internal::Handle<v8::internal::JSObject> obj);
   static inline Local<Number> NumberToLocal(
       v8::internal::Handle<v8::internal::Object> obj);
   static inline Local<Integer> IntegerToLocal(
@@ -227,6 +231,10 @@
       OpenHandle(const Function* data);
   static inline v8::internal::Handle<v8::internal::JSObject>
       OpenHandle(const Message* message);
+  static inline v8::internal::Handle<v8::internal::JSArray>
+      OpenHandle(const StackTrace* stack_trace);
+  static inline v8::internal::Handle<v8::internal::JSObject>
+      OpenHandle(const StackFrame* stack_frame);
   static inline v8::internal::Handle<v8::internal::Context>
       OpenHandle(const v8::Context* context);
   static inline v8::internal::Handle<v8::internal::SignatureInfo>
@@ -275,6 +283,8 @@
 MAKE_TO_LOCAL(ToLocal, SignatureInfo, Signature)
 MAKE_TO_LOCAL(ToLocal, TypeSwitchInfo, TypeSwitch)
 MAKE_TO_LOCAL(MessageToLocal, Object, Message)
+MAKE_TO_LOCAL(StackTraceToLocal, JSArray, StackTrace)
+MAKE_TO_LOCAL(StackFrameToLocal, JSObject, StackFrame)
 MAKE_TO_LOCAL(NumberToLocal, Object, Number)
 MAKE_TO_LOCAL(IntegerToLocal, Object, Integer)
 MAKE_TO_LOCAL(Uint32ToLocal, Object, Uint32)
@@ -305,6 +315,8 @@
 MAKE_OPEN_HANDLE(Message, JSObject)
 MAKE_OPEN_HANDLE(Context, Context)
 MAKE_OPEN_HANDLE(External, Proxy)
+MAKE_OPEN_HANDLE(StackTrace, JSArray)
+MAKE_OPEN_HANDLE(StackFrame, JSObject)
 
 #undef MAKE_OPEN_HANDLE