Create ast/ and parsing/ subdirectories and move appropriate files

src/code-stubs.cc

 // Copyright 2012 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/code-stubs.h"
 
 #include <sstream>
 
 #include "src/bootstrapper.h"
 #include "src/factory.h"
 #include "src/gdb-jit.h"
 #include "src/ic/handler-compiler.h"
 #include "src/ic/ic.h"
 #include "src/macro-assembler.h"
-#include "src/parser.h"
+#include "src/parsing/parser.h"
 #include "src/profiler/cpu-profiler.h"
 
 namespace v8 {
 namespace internal {
 
 
 RUNTIME_FUNCTION(UnexpectedStubMiss) {
   FATAL("Unexpected deopt of a stub");
   return Smi::FromInt(0);
 }
@@ skipping 1035 matching lines @@
   if (type->Is(Type::UntaggedPointer())) {
     return Representation::External();
   }
 
   DCHECK(!type->Is(Type::Untagged()));
   return Representation::Tagged();
 }
 
 }  // namespace internal
 }  // namespace v8