[compiler] Add baseline tier to compilation pipeline.

src/objects.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 11952 matching lines @@
   FixedArray* const literals = data->LiteralArray();
   int const inlined_count = data->InlinedFunctionCount()->value();
   for (int i = 0; i < inlined_count; ++i) {
     if (SharedFunctionInfo::cast(literals->get(i)) == candidate) {
       return true;
     }
   }
   return false;
 }
 
+void JSFunction::MarkForBaseline() {
+  Isolate* isolate = GetIsolate();
+  set_code_no_write_barrier(
+      isolate->builtins()->builtin(Builtins::kCompileBaseline));
+  // No write barrier required, since the builtin is part of the root set.
+}
 
 void JSFunction::MarkForOptimization() {
   Isolate* isolate = GetIsolate();
   DCHECK(!IsOptimized());
   DCHECK(shared()->allows_lazy_compilation() ||
          !shared()->optimization_disabled());
   set_code_no_write_barrier(
       isolate->builtins()->builtin(Builtins::kCompileOptimized));
   // No write barrier required, since the builtin is part of the root set.
 }
@@ skipping 7452 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8