Enable weak embedded maps in optimized code.

src/isolate.h

 // Copyright 2012 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 723 matching lines @@
                                       unsigned int magic2));
   Handle<JSArray> CaptureCurrentStackTrace(
       int frame_limit,
       StackTrace::StackTraceOptions options);
 
   Handle<JSArray> CaptureSimpleStackTrace(Handle<JSObject> error_object,
                                           Handle<Object> caller,
                                           int limit);
   void CaptureAndSetDetailedStackTrace(Handle<JSObject> error_object);
 
+  StackFrame* TopOptimizedFrame();

[Michael Starzinger, 2013/07/02 14:20:54]

Can we inline this functionality into mark-compact.cc directly to where it's
being used, I think nobody should be tempted to use this.

[ulan, 2013/07/02 14:45:41]

Done.

+
   // Returns if the top context may access the given global object. If
   // the result is false, the pending exception is guaranteed to be
   // set.
   bool MayNamedAccess(JSObject* receiver,
                       Object* key,
                       v8::AccessType type);
   bool MayIndexedAccess(JSObject* receiver,
                         uint32_t index,
                         v8::AccessType type);
 
@@ skipping 737 matching lines @@
 
 // Mark the native context with out of memory.
 inline void Context::mark_out_of_memory() {
   native_context()->set_out_of_memory(HEAP->true_value());
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_