Use a direct include of strings headers in chrome/app/.

chrome/app/breakpad_field_trial_win.cc

 // 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.
 
 #include "chrome/app/breakpad_field_trial_win.h"
 
 #include "base/lazy_instance.h"
-#include "base/string_util.h"
-#include "base/string16.h"
-#include "base/stringprintf.h"
+#include "base/strings/string16.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "breakpad/src/client/windows/common/ipc_protocol.h"
 #include "chrome/app/breakpad_win.h"
 #include "chrome/common/child_process_logging.h"
 
 // Sets the breakpad experiment chunks for crash reporting. |chunks| is an
 // array of C strings of size |chunk_size| containing the values to set, where
 // each entry may contain multiple experiment tuples, with the total number of
 // experiments indicated by |experiments_chunks|.
 // Note that this is suffixed with "3" due to parameter changes that were made
 // to the predecessor functions. If the signature changes again, use a new name.
@@ skipping 28 matching lines @@
 namespace testing {
 
 void SetExperimentChunks(const std::vector<string16>& chunks,
                          size_t experiments_count) {
   std::vector<const wchar_t*> cstrings;
   StringVectorToCStringVector(chunks, &cstrings);
   ::SetExperimentList3(&cstrings[0], cstrings.size(), experiments_count);
 }
 
 }  // namespace testing