Fix presubmit errors caused by updated depot tools

src/regexp-stack.h

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 71 matching lines @@
   // If passing zero, the default/minimum size buffer is allocated.
   Address EnsureCapacity(size_t size);
 
   // Thread local archiving.
   static int ArchiveSpacePerThread() {
     return static_cast<int>(sizeof(ThreadLocal));
   }
   char* ArchiveStack(char* to);
   char* RestoreStack(char* from);
   void FreeThreadResources() { thread_local_.Free(); }
+
  private:
   RegExpStack();
   ~RegExpStack();
 
   // Artificial limit used when no memory has been allocated.
   static const uintptr_t kMemoryTop = static_cast<uintptr_t>(-1);
 
   // Minimal size of allocated stack area.
   static const size_t kMinimumStackSize = 1 * KB;
 
@@ skipping 36 matching lines @@
   friend class ExternalReference;
   friend class Isolate;
   friend class RegExpStackScope;
 
   DISALLOW_COPY_AND_ASSIGN(RegExpStack);
 };
 
 }}  // namespace v8::internal
 
 #endif  // V8_REGEXP_STACK_H_