LevelDB: Using base::File for all file I/O

third_party/leveldatabase/chromium_logger.h

 // Copyright (c) 2012 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 THIRD_PARTY_LEVELDATABASE_CHROMIUM_LOGGER_H_
 #define THIRD_PARTY_LEVELDATABASE_CHROMIUM_LOGGER_H_
 
-#include <stdio.h>
-
-#include <algorithm>
-
+#include "base/files/file.h"
 #include "base/format_macros.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "third_party/leveldatabase/src/include/leveldb/env.h"
 
 namespace leveldb {
 
 class ChromiumLogger : public Logger {
  public:
-  explicit ChromiumLogger(FILE* f) : file_(f) {}
-  virtual ~ChromiumLogger() {
-    fclose(file_);
-  }
+  explicit ChromiumLogger(base::File* f) : file_(f) {}
+  virtual ~ChromiumLogger() {}
   virtual void Logv(const char* format, va_list ap) {
     const base::PlatformThreadId thread_id =
         ::base::PlatformThread::CurrentId();
 
     // We try twice: the first time with a fixed-size stack allocated buffer,
     // and the second time with a much larger dynamically allocated buffer.
     char buffer[500];
     for (int iter = 0; iter < 2; iter++) {
       char* base;
       int bufsize;
@@ skipping 37 matching lines @@
           p = limit - 1;
         }
       }
 
       // Add newline if necessary
       if (p == base || p[-1] != '\n') {
         *p++ = '\n';
       }
 
       assert(p <= limit);
-      fwrite(base, 1, p - base, file_);
-      fflush(file_);
+      file_->WriteAtCurrentPos(base, p - base);
       if (base != buffer) {
         delete[] base;
       }
       break;
     }
   }
 
  private:
-  FILE* file_;
+  scoped_ptr<base::File> file_;
 };
 
 }  // namespace leveldb
 
 #endif  // THIRD_PARTY_LEVELDATABASE_CHROMIUM_LOGGER_H_