Fix warnings on Win64.

src/bootstrapper.cc

 // Copyright 2006-2008 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 80 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(SourceCodeCache);
 };
 
 static SourceCodeCache natives_cache(Script::TYPE_NATIVE);
 static SourceCodeCache extensions_cache(Script::TYPE_EXTENSION);
 // This is for delete, not delete[].
 static List<char*>* delete_these_non_arrays_on_tear_down = NULL;
 
 
 NativesExternalStringResource::NativesExternalStringResource(const char* source)
-    : data_(source), length_(strlen(source)) {
+    : data_(source), length_(StrLength(source)) {
   if (delete_these_non_arrays_on_tear_down == NULL) {
     delete_these_non_arrays_on_tear_down = new List<char*>(2);
   }
   // The resources are small objects and we only make a fixed number of
   // them, but let's clean them up on exit for neatness.
   delete_these_non_arrays_on_tear_down->
       Add(reinterpret_cast<char*>(this));
 }
 
 
@@ skipping 1526 matching lines @@
 }
 
 
 // Restore statics that are thread local.
 char* Genesis::RestoreState(char* from) {
   current_ = *reinterpret_cast<Genesis**>(from);
   return from + sizeof(current_);
 }
 
 } }  // namespace v8::internal