A build fix for Mac GCC.

net/base/file_stream_posix.cc

 // Copyright (c) 2011 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.
 
 // For 64-bit file access (off_t = off64_t, lseek64, etc).
 #define _FILE_OFFSET_BITS 64
 
 #include "net/base/file_stream.h"
 
 #include <sys/types.h>
@@ skipping 87 matching lines @@
 // calls MapSystemError() to map errno to net error codes.  It tries to flush to
 // completion.
 int FlushFile(base::PlatformFile file, bool record_uma) {
   base::ThreadRestrictions::AssertIOAllowed();
   ssize_t res = HANDLE_EINTR(fsync(file));
   if (res == -1)
     RecordAndMapError(errno, FILE_ERROR_SOURCE_FLUSH, record_uma);
   return res;
 }
 
+}  // namespace
+
 // Cancelable wrapper around a Closure.
 class CancelableCallback {
  public:
   explicit CancelableCallback(const base::Closure& callback)
       : canceled_(false),
         callback_(callback) {}
 
   void Run() {
     if (!canceled_)
       callback_.Run();
   }
 
   void Cancel() {
     canceled_ = true;
   }
 
  private:
   bool canceled_;
   const base::Closure callback_;
 };
 
-}  // namespace
-
 // FileStream::AsyncContext ----------------------------------------------
 
 class FileStream::AsyncContext {
  public:
   AsyncContext();
   ~AsyncContext();
 
   // These methods post synchronous read() and write() calls to a WorkerThread.
   void InitiateAsyncRead(
       base::PlatformFile file, char* buf, int buf_len,
@@ skipping 317 matching lines @@
     return ERR_UNEXPECTED;
 
   return FlushFile(file_, record_uma_);
 }
 
 void FileStream::EnableErrorStatistics() {
   record_uma_ = true;
 }
 
 }  // namespace net