Prepare for removal of source_filter.gypi:

runtime/bin/file_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+#include "platform/globals.h"
+#if defined(TARGET_OS_LINUX)
+
 #include "bin/file.h"
 
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <libgen.h>
+#include <errno.h>  // NOLINT
+#include <fcntl.h>  // NOLINT
+#include <sys/stat.h>  // NOLINT
+#include <unistd.h>  // NOLINT
+#include <libgen.h>  // NOLINT
 
 #include "bin/builtin.h"
 #include "bin/log.h"
 
 class FileHandle {
  public:
   explicit FileHandle(int fd) : fd_(fd) { }
   ~FileHandle() { }
   int fd() const { return fd_; }
   void set_fd(int fd) { fd_ = fd; }
@@ skipping 213 matching lines @@
   int result = fstat(fd, &buf);
   if (result == -1) {
     FATAL2("Failed stat on file descriptor %d: %s", fd, strerror(errno));
   }
   if (S_ISCHR(buf.st_mode)) return kTerminal;
   if (S_ISFIFO(buf.st_mode)) return kPipe;
   if (S_ISSOCK(buf.st_mode)) return kSocket;
   if (S_ISREG(buf.st_mode)) return kFile;
   return kOther;
 }
+
+#endif  // defined(TARGET_OS_LINUX)