Make exception thrown via v8 public API propagate to v8::TryCatch as JS thrown exceptions do.

src/handles.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 224 matching lines @@
 Handle<Object> SetOwnElement(Handle<JSObject> object,
                              uint32_t index,
                              Handle<Object> value);
 
 Handle<Object> GetProperty(Handle<JSObject> obj,
                            const char* name);
 
 Handle<Object> GetProperty(Handle<Object> obj,
                            Handle<Object> key);
 
+Handle<Object> GetProperty(Handle<JSObject> obj,
+                           Handle<String> name,
+                           LookupResult* result);
+
+
 Handle<Object> GetElement(Handle<Object> obj,
                           uint32_t index);
 
 Handle<Object> GetPropertyWithInterceptor(Handle<JSObject> receiver,
                                           Handle<JSObject> holder,
                                           Handle<String> name,
                                           PropertyAttributes* attributes);
 
 Handle<Object> GetPrototype(Handle<Object> obj);
 
@@ skipping 122 matching lines @@
  private:
   bool has_been_transformed_;  // Tells whether the object has been transformed.
   int unused_property_fields_;  // Captures the unused number of field.
   Handle<JSObject> object_;    // The object being optimized.
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HANDLES_H_