Store OSR'd optimized code on the native context.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 6b9917f08a94bd1818be563faa75e4b05662f2a3..b54222fff980332d7b35716a86eb6dbfc726e63e 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -1164,6 +1164,12 @@ class Isolate {
     return compiler_dispatcher_tracer_;
   }
 
+  // Clear all optimized code stored in native contexts.
+  void ClearOSROptimizedCode();
+
+  // Ensure that a particular optimized code is evicted.
+  void EvictOSROptimizedCode(Code* code, const char* reason);
+
   bool IsInAnyContext(Object* object, uint32_t index);
 
   void SetRAILMode(RAILMode rail_mode);