Use a direct include of strings headers in chrome/browser/r*-s*/.

chrome/browser/storage_monitor/storage_info.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_STORAGE_MONITOR_STORAGE_INFO_H_
 #define CHROME_BROWSER_STORAGE_MONITOR_STORAGE_INFO_H_
 
 #include "base/files/file_path.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 
 namespace chrome {
 
 struct StorageInfo {
  public:
   enum Type {
     // A removable mass storage device with a DCIM directory.
     REMOVABLE_MASS_STORAGE_WITH_DCIM,
     // A removable mass storage device without a DCIM directory.
     REMOVABLE_MASS_STORAGE_NO_DCIM,
@@ skipping 86 matching lines @@
   string16 model_name_;
 
   // Size of the removable device in bytes.
   // Zero if not collected or unknown.
   uint64 total_size_in_bytes_;
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_STORAGE_MONITOR_STORAGE_INFO_H_