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

base/strings/utf_offset_string_conversions.cc

 // 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.
 
 #include "base/strings/utf_offset_string_conversions.h"
 
 #include <algorithm>
 
 #include "base/memory/scoped_ptr.h"
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 #include "base/strings/utf_string_conversion_utils.h"
 
 namespace base {
 
 // Converts the given source Unicode character type to the given destination
 // Unicode character type as a STL string. The given input buffer and size
 // determine the source, and the given output STL string will be replaced by
 // the result.
 template<typename SrcChar, typename DestStdString>
 bool ConvertUnicode(const SrcChar* src,
@@ skipping 136 matching lines @@
     if (*offset < (i->original_offset + i->original_length)) {
       *offset = string16::npos;
       return;
     }
     adjustment += (i->original_length - i->output_length);
   }
   *offset -= adjustment;
 }
 
 }  // namespace base