Move regexp implementation into its own folder.

src/regexp/regexp-stack.cc

 // Copyright 2009 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/v8.h"
 
-#include "src/regexp-stack.h"
+#include "src/regexp/regexp-stack.h"
 
 namespace v8 {
 namespace internal {
 
 RegExpStackScope::RegExpStackScope(Isolate* isolate)
     : regexp_stack_(isolate->regexp_stack()) {
   // Initialize, if not already initialized.
   regexp_stack_->EnsureCapacity(0);
 }
 
@@ skipping 61 matching lines @@
     thread_local_.memory_ = new_memory;
     thread_local_.memory_size_ = size;
     thread_local_.limit_ = new_memory + kStackLimitSlack * kPointerSize;
   }
   return thread_local_.memory_ + thread_local_.memory_size_;
 }
 
 
 }  // namespace internal
 }  // namespace v8