Reland "Keep a canonical list of shared function infos."

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index c508dd28db3b2d7d3784185563bd270497a9b1cd..81a0c558d071b3542e2968bfe9dbc682c9fc4480 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -5138,6 +5138,7 @@ ACCESSORS(Script, line_ends, Object, kLineEndsOffset)
 ACCESSORS(Script, eval_from_shared, Object, kEvalFromSharedOffset)
 ACCESSORS_TO_SMI(Script, eval_from_instructions_offset,
                  kEvalFrominstructionsOffsetOffset)
+ACCESSORS(Script, shared_function_infos, Object, kSharedFunctionInfosOffset)
 ACCESSORS_TO_SMI(Script, flags, kFlagsOffset)
 ACCESSORS(Script, source_url, Object, kSourceUrlOffset)
 ACCESSORS(Script, source_mapping_url, Object, kSourceMappingUrlOffset)
@@ -5232,6 +5233,8 @@ BOOL_ACCESSORS(SharedFunctionInfo,
                kHasDuplicateParameters)
 BOOL_ACCESSORS(SharedFunctionInfo, compiler_hints, asm_function, kIsAsmFunction)
 BOOL_ACCESSORS(SharedFunctionInfo, compiler_hints, deserialized, kDeserialized)
+BOOL_ACCESSORS(SharedFunctionInfo, compiler_hints, never_compiled,
+               kNeverCompiled)
 
 
 #if V8_HOST_ARCH_32_BIT
@@ -5446,6 +5449,8 @@ void SharedFunctionInfo::ReplaceCode(Code* value) {
   DCHECK(code()->gc_metadata() == NULL && value->gc_metadata() == NULL);
 
   set_code(value);
+
+  if (is_compiled()) set_never_compiled(false);
 }