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

content/browser/download/base_file_unittest.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 "content/browser/download/base_file.h"
 
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/test/test_file_util.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "crypto/secure_hash.h"
 #include "net/base/file_stream.h"
 #include "net/base/mock_file_stream.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 namespace {
@@ skipping 603 matching lines @@
   base::FilePath temp_file;
   ASSERT_TRUE(file_util::CreateTemporaryFileInDir(temp_dir_.path(),
                                                   &temp_file));
   ASSERT_FALSE(temp_file.empty());
   EXPECT_STREQ(temp_file.DirName().value().c_str(),
                base_file_->full_path().DirName().value().c_str());
   base_file_->Finish();
 }
 
 }  // namespace content