Replace FileUtilProxy with FileProxy in renderer_host/pepper

base/files/file_proxy.h

 // Copyright 2014 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 BASE_FILES_FILE_PROXY_H_
 #define BASE_FILES_FILE_PROXY_H_
 
 #include "base/base_export.h"
 #include "base/callback_forward.h"
 #include "base/files/file.h"
@@ skipping 15 matching lines @@
 // the operation to File using a TaskRunner.
 //
 // This class performs automatic proxying to close the underlying file at
 // destruction.
 //
 // The TaskRunner is in charge of any sequencing of the operations, but a single
 // operation can be proxied at a time, regardless of the use of a callback.
 // In other words, having a sequence like
 //
 //   proxy.Write(...);
-//   delete proxy;
+//   proxy.Write(...);
 //
-// will keep the file valid during the Write operation but will cause the file
-// to be closed in the current thread, when the operation finishes. If Close is
-// called right away after Write, the second call will fail because there is an
-// operation in progress.
+// means the second Write will always fail.
 class BASE_EXPORT FileProxy : public SupportsWeakPtr<FileProxy> {
  public:
   // This callback is used by methods that report only an error code. It is
   // valid to pass a null callback to some functions that takes a
   // StatusCallback, in which case the operation will complete silently.
   typedef Callback<void(File::Error)> StatusCallback;
 
   typedef Callback<void(File::Error,
                         const FilePath&)> CreateTemporaryCallback;
   typedef Callback<void(File::Error,
@@ skipping 29 matching lines @@
   bool CreateTemporary(uint32 additional_file_flags,
                        const CreateTemporaryCallback& callback);
 
   // Returns true if the underlying |file_| is valid.
   bool IsValid() const;
 
   // Returns true if a new file was created (or an old one truncated to zero
   // length to simulate a new file), and false otherwise.
   bool created() const { return file_.created(); }
 
+  // Claims ownership of |file|. It is an error to call this method when
+  // IsValid() returns true.
+  void SetFile(File file);
+
   File TakeFile();
 
+  PlatformFile GetPlatformFile() const;
+
   // Proxies File::Close. The callback can be null.
   // This returns false if task posting to |task_runner| has failed.
   bool Close(const StatusCallback& callback);
 
   // Proxies File::GetInfo. The callback can't be null.
   // This returns false if task posting to |task_runner| has failed.
   bool GetInfo(const GetFileInfoCallback& callback);
 
   // Proxies File::Read. The callback can't be null.
   // This returns false if |bytes_to_read| is less than zero, or
@@ skipping 17 matching lines @@
   // Proxies File::SetLength. The callback can be null.
   // This returns false if task posting to |task_runner| has failed.
   bool SetLength(int64 length, const StatusCallback& callback);
 
   // Proxies File::Flush. The callback can be null.
   // This returns false if task posting to |task_runner| has failed.
   bool Flush(const StatusCallback& callback);
 
  private:
   friend class FileHelper;
-  void SetFile(File file);
   TaskRunner* task_runner() { return task_runner_.get(); }
 
   scoped_refptr<TaskRunner> task_runner_;
   File file_;
   DISALLOW_COPY_AND_ASSIGN(FileProxy);
 };
 
 }  // namespace base
 
 #endif  // BASE_FILES_FILE_PROXY_H_