Update the remaining include paths of base/string_piece.h to its new location.

tools/json_schema_compiler/cpp_bundle_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 code
 import cpp_util
 from model import Platforms
 from schema_util import CapitalizeFirstLetter
 from schema_util import JsFunctionNameToClassName
 
@@ skipping 191 matching lines @@
 class _SchemasHGenerator(object):
   """Generates a code.Code object for the generated schemas .h file"""
   def __init__(self, cpp_bundle):
     self._bundle = cpp_bundle
 
   def Generate(self, namespace):
     c = code.Code()
     c.Append('#include <map>')
     c.Append('#include <string>')
     c.Append();
-    c.Append('#include "base/string_piece.h"')
+    c.Append('#include "base/strings/string_piece.h"')
     c.Append()
     c.Concat(cpp_util.OpenNamespace(self._bundle._cpp_namespace))
     c.Append()
     c.Append('class GeneratedSchemas {')
     c.Sblock(' public:')
     c.Append('// Puts all API schemas in |schemas|.')
     c.Append('static void Get('
                  'std::map<std::string, base::StringPiece>* schemas);')
     c.Eblock('};');
     c.Append()
@@ skipping 25 matching lines @@
                                 separators=(',', ':'))
       # Escape all double-quotes and backslashes. For this to output a valid
       # JSON C string, we need to escape \ and ".
       json_content = json_content.replace('\\', '\\\\').replace('"', '\\"')
       c.Append('(*schemas)["%s"] = "%s";' % (namespace.name, json_content))
     c.Eblock('}')
     c.Append()
     c.Concat(cpp_util.CloseNamespace(self._bundle._cpp_namespace))
     c.Append()
     return c