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

chrome/browser/google_apis/time_util.h

 // 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.
 
 #ifndef CHROME_BROWSER_GOOGLE_APIS_TIME_UTIL_H_
 #define CHROME_BROWSER_GOOGLE_APIS_TIME_UTIL_H_
 
 #include <string>
 
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 
 namespace base {
 class Time;
 }  // namespace base
 
 namespace google_apis {
 namespace util {
 
 // Parses an RFC 3339 date/time into a base::Time, returning true on success.
 // The time string must be in the format "yyyy-mm-ddThh:mm:ss.dddTZ" (TZ is
 // either '+hh:mm', '-hh:mm', 'Z' (representing UTC), or an empty string).
 bool GetTimeFromString(const base::StringPiece& raw_value, base::Time* time);
 
 // Formats a base::Time as an RFC 3339 date/time (in UTC).
 std::string FormatTimeAsString(const base::Time& time);
 // Formats a base::Time as an RFC 3339 date/time (in localtime).
 std::string FormatTimeAsStringLocaltime(const base::Time& time);
 
 }  // namespace util
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_TIME_UTIL_H_