[Extensions] Remove linked_ptr entirely from extensions generated code

tools/json_schema_compiler/h_generator.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 
 from code import Code
 from model import PropertyType
 import cpp_util
 import schema_util
@@ skipping 39 matching lines @@
     (c.Append('#ifndef %s' % ifndef_name)
       .Append('#define %s' % ifndef_name)
       .Append()
       .Append('#include <stdint.h>')
       .Append()
       .Append('#include <map>')
       .Append('#include <string>')
       .Append('#include <vector>')
       .Append()
       .Append('#include "base/logging.h"')
-      .Append('#include "base/memory/linked_ptr.h"')
       .Append('#include "base/memory/scoped_ptr.h"')
       .Append('#include "base/values.h"')
       .Cblock(self._type_helper.GenerateIncludes(include_soft=include_soft))
       .Append()
     )
 
     # Hack: we're not generating soft includes for tabs and windows, so we need
     # to generate forward declarations for them.
     if not include_soft:
       c.Cblock(self._type_helper.GenerateForwardDeclarations())
@@ skipping 326 matching lines @@
     """Builds the parameter list for a function, given an array of parameters.
     """
     # |error| is populated with warnings and/or errors found during parsing.
     # |error| being set does not necessarily imply failure and may be
     # recoverable.
     # For example, optional properties may have failed to parse, but the
     # parser was able to continue.
     if self._generate_error_messages:
       params += ('base::string16* error',)
     return ', '.join(str(p) for p in params)