Remove some PlatformFile uses from NaCl.

components/nacl/browser/nacl_browser.h

 // Copyright 2013 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.
 
 #ifndef COMPONENTS_NACL_BROWSER_NACL_BROWSER_H_
 #define COMPONENTS_NACL_BROWSER_NACL_BROWSER_H_
 
 #include <deque>
 
 #include "base/bind.h"
 #include "base/containers/mru_cache.h"
+#include "base/files/file.h"
 #include "base/files/file_util_proxy.h"
 #include "base/memory/singleton.h"
 #include "base/memory/weak_ptr.h"
 #include "base/platform_file.h"
 #include "base/time/time.h"
 #include "components/nacl/browser/nacl_browser_delegate.h"
 #include "components/nacl/browser/nacl_validation_cache.h"
 
 class URLPattern;
 class GURL;
 
 namespace nacl {
 
 // Open an immutable executable file that can be mmapped.
 // This function should only be called on a thread that can perform file IO.
-base::PlatformFile OpenNaClExecutableImpl(const base::FilePath& file_path);
+base::File OpenNaClExecutableImpl(const base::FilePath& file_path);
 
 // Represents shared state for all NaClProcessHost objects in the browser.
 class NaClBrowser {
  public:
   static NaClBrowser* GetInstance();
 
   // Will it be possible to launch a NaCl process, eventually?
   bool IsOk() const;
 
   // Are we ready to launch a NaCl process now?  Implies IsOk().
@@ skipping 141 matching lines @@
   scoped_ptr<NaClBrowserDelegate> browser_delegate_;
 
   std::deque<base::Time> crash_times_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClBrowser);
 };
 
 } // namespace nacl
 
 #endif  // COMPONENTS_NACL_BROWSER_NACL_BROWSER_H_