Move platform_thread to base/threading and put in the base namespace. I left ...

base/file_util_unittest.cc

 // Copyright (c) 2010 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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <winioctl.h>
 #include <shellapi.h>
 #include <shlobj.h>
 #include <tchar.h>
 #endif
 
 #include <fstream>
 #include <set>
 
 #include "base/base_paths.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
-#include "base/platform_thread.h"
 #include "base/scoped_handle.h"
 #include "base/scoped_temp_dir.h"
+#include "base/threading/platform_thread.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 // This macro helps avoid wrapped lines in the test structs.
 #define FPL(x) FILE_PATH_LITERAL(x)
 
 namespace {
 
@@ skipping 305 matching lines @@
 
 // Flaky, http://crbug.com/46246
 TEST_F(FileUtilTest, FLAKY_CountFilesCreatedAfter) {
   // Create old file (that we don't want to count)
   FilePath old_file_name =
       temp_dir_.path().Append(FILE_PATH_LITERAL("Old File.txt"));
   CreateTextFile(old_file_name, L"Just call me Mr. Creakybits");
 
   // Age to perfection
 #if defined(OS_WIN)
-  PlatformThread::Sleep(100);
+  base::PlatformThread::Sleep(100);
 #elif defined(OS_POSIX)
   // We need to wait at least one second here because the precision of
   // file creation time is one second.
-  PlatformThread::Sleep(1500);
+  base::PlatformThread::Sleep(1500);
 #endif
 
   // Establish our cutoff time
   base::Time now(base::Time::NowFromSystemTime());
   EXPECT_EQ(0, file_util::CountFilesCreatedAfter(temp_dir_.path(), now));
 
   // Create a new file (that we do want to count)
   FilePath new_file_name =
       temp_dir_.path().Append(FILE_PATH_LITERAL("New File.txt"));
   CreateTextFile(new_file_name, L"Waaaaaaaaaaaaaah.");
@@ skipping 1462 matching lines @@
   EXPECT_TRUE(file_util::IsDirectoryEmpty(empty_dir));
 
   FilePath foo(empty_dir.Append(FILE_PATH_LITERAL("foo.txt")));
   std::string bar("baz");
   ASSERT_TRUE(file_util::WriteFile(foo, bar.c_str(), bar.length()));
 
   EXPECT_FALSE(file_util::IsDirectoryEmpty(empty_dir));
 }
 
 }  // namespace