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

base/vlog.h

 // Copyright (c) 2011 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.
 
 #ifndef BASE_VLOG_H_
 #define BASE_VLOG_H_
 
 #include <cstddef>
 #include <string>
 #include <vector>
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 
 namespace logging {
 
 // A helper class containing all the settings for vlogging.
 class BASE_EXPORT VlogInfo {
  public:
   static const int kDefaultVlogLevel;
 
   // |v_switch| gives the default maximal active V-logging level; 0 is
   // the default.  Normally positive values are used for V-logging
@@ skipping 44 matching lines @@
 //   "kh?n" matches "khan" but not "khn" or "khaan"
 //   "kh*n" matches "khn", "khan", or even "khaaaaan"
 //   "/foo\bar" matches "/foo/bar", "\foo\bar", or "/foo\bar"
 //     (disregarding C escaping rules)
 BASE_EXPORT bool MatchVlogPattern(const base::StringPiece& string,
                                   const base::StringPiece& vlog_pattern);
 
 }  // namespace logging
 
 #endif  // BASE_VLOG_H_