Fix kraken/oscillator performance regression after r19635.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 74a252c63deaba37811c96b65374145a8c9f5bac..3670baf78b04845eba2676b6bb82c63a6802d3c1 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -5413,6 +5413,11 @@ 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