[Isolates] Merge crankshaft (r5922 from bleeding_edge).

src/objects-debug.cc

 // 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 757 matching lines @@
   PrintProperties();
   PrintElements();
 
   PrintF("\n");
 }
 
 
 void JSFunction::JSFunctionVerify() {
   CHECK(IsJSFunction());
   VerifyObjectField(kPrototypeOrInitialMapOffset);
+  VerifyObjectField(kNextFunctionLinkOffset);
+  CHECK(next_function_link()->IsUndefined() ||
+        next_function_link()->IsJSFunction());
 }
 
 
 void SharedFunctionInfo::SharedFunctionInfoPrint() {
   HeapObject::PrintHeader("SharedFunctionInfo");
   PrintF(" - name: ");
   name()->ShortPrint();
   PrintF("\n - expected_nof_properties: %d", expected_nof_properties());
   PrintF("\n - instance class name = ");
   instance_class_name()->Print();
@@ skipping 606 matching lines @@
         ASSERT(e->IsUndefined());
       }
     }
   }
 }
 
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal