Deleted OS_WIN and all Windows specific files from base.

base/files/file_proxy_unittest.cc

Index: base/files/file_proxy_unittest.cc
diff --git a/base/files/file_proxy_unittest.cc b/base/files/file_proxy_unittest.cc
index df0bbc869c2d9a31a0113cf18d9b0961b8f35bae..55436734e6a95073629f7433907b93e6a0d178d9 100644
--- a/base/files/file_proxy_unittest.cc
+++ b/base/files/file_proxy_unittest.cc
@@ -160,11 +160,6 @@ TEST_F(FileProxyTest, Close) {
   FileProxy proxy(file_task_runner());
   CreateProxy(File::FLAG_CREATE | File::FLAG_WRITE, &proxy);
 
-#if defined(OS_WIN)
-  // This fails on Windows if the file is not closed.
-  EXPECT_FALSE(base::Move(test_path(), test_dir_path().AppendASCII("new")));
-#endif
-
   proxy.Close(Bind(&FileProxyTest::DidFinish, weak_factory_.GetWeakPtr()));
   MessageLoop::current()->Run();
   EXPECT_EQ(File::FILE_OK, error_);