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

content/browser/indexed_db/indexed_db_backing_store_unittest.cc

 // 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.
 
 #include "content/browser/indexed_db/indexed_db_backing_store.h"
 
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/logging.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/indexed_db/indexed_db_factory.h"
 #include "content/browser/indexed_db/indexed_db_leveldb_coding.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/platform/WebData.h"
 
 using WebKit::WebSecurityOrigin;
 using WebKit::WebIDBKey;
 
@@ skipping 402 matching lines @@
   WebSecurityOrigin ok_origin =
       WebSecurityOrigin::createFromString("http://someorigin.com:82/");
   scoped_refptr<IndexedDBBackingStore> diskStore2 =
       factory->TestOpenBackingStore(ok_origin, base_path);
   EXPECT_TRUE(diskStore2);
 }
 
 }  // namespace
 
 }  // namespace content