Use a direct include of strings headers in content/browser/, part 1.

content/browser/indexed_db/indexed_db_database_callbacks_wrapper.h

 // Copyright (c) 2013 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 CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DATABASE_CALLBACKS_WRAPPER_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DATABASE_CALLBACKS_WRAPPER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "content/browser/indexed_db/indexed_db_database_error.h"
 #include "content/common/content_export.h"
 
 namespace content {
 class IndexedDBDatabaseCallbacks;
 
 class CONTENT_EXPORT IndexedDBDatabaseCallbacksWrapper
     : public base::RefCounted<IndexedDBDatabaseCallbacksWrapper> {
  public:
   static scoped_refptr<IndexedDBDatabaseCallbacksWrapper> Create(
@@ skipping 15 matching lines @@
 
  private:
   friend class base::RefCounted<IndexedDBDatabaseCallbacksWrapper>;
 
   scoped_ptr<IndexedDBDatabaseCallbacks> callbacks_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DATABASE_CALLBACKS_WRAPPER_H_