Fix kraken/oscillator performance regression after r19635.

src/objects-inl.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 5395 matching lines @@
   ASSERT(!GetHeap()->InNewSpace(value));
   Address entry = value->entry();
   WRITE_INTPTR_FIELD(this, kCodeEntryOffset, reinterpret_cast<intptr_t>(entry));
 }
 
 
 void JSFunction::ReplaceCode(Code* code) {
   bool was_optimized = IsOptimized();
   bool is_optimized = code->kind() == Code::OPTIMIZED_FUNCTION;
 
+  if (was_optimized && is_optimized) {
+    shared()->EvictFromOptimizedCodeMap(this->code(),
+        "Replacing with another optimized code");
+  }
+
   set_code(code);
 
   // Add/remove the function from the list of optimized functions for this
   // context based on the state change.
   if (!was_optimized && is_optimized) {
     context()->native_context()->AddOptimizedFunction(this);
   }
   if (was_optimized && !is_optimized) {
     // TODO(titzer): linear in the number of optimized functions; fix!
     context()->native_context()->RemoveOptimizedFunction(this);
@@ skipping 1304 matching lines @@
 #undef READ_UINT32_FIELD
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_