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

content/browser/indexed_db/indexed_db_leveldb_coding_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_leveldb_coding.h"
 
 #include <limits>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/indexed_db/leveldb/leveldb_slice.h"
 #include "content/common/indexed_db/indexed_db_key.h"
 #include "content/common/indexed_db/indexed_db_key_path.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::StringPiece;
 using WebKit::WebIDBKey;
 using WebKit::WebIDBKeyPath;
@@ skipping 797 matching lines @@
     std::vector<char> vB = WrappedEncodeVarInt(static_cast<int64>(n));
 
     EXPECT_EQ(vA.size(), vB.size());
     EXPECT_EQ(*vA.begin(), *vB.begin());
   }
 }
 
 }  // namespace
 
 }  // namespace content