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

chrome/browser/google_apis/test_server/http_connection.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_TEST_SERVER_HTTP_CONNECTION_H_
 #define CHROME_BROWSER_GOOGLE_APIS_TEST_SERVER_HTTP_CONNECTION_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 #include "chrome/browser/google_apis/test_server/http_request.h"
 
 namespace net {
 class StreamListenSocket;
 }
 
 namespace google_apis {
 namespace test_server {
 
 class HttpConnection;
@@ skipping 28 matching lines @@
   const HandleRequestCallback callback_;
   HttpRequestParser request_parser_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpConnection);
 };
 
 }  // namespace test_server
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_TEST_SERVER_HTTP_CONNECTION_H_