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

third_party/leveldatabase/env_chromium.h

Index: third_party/leveldatabase/env_chromium.h
diff --git a/third_party/leveldatabase/env_chromium.h b/third_party/leveldatabase/env_chromium.h
index b340c26051aedc7fa3be55c0dc028fb7a07c1438..3f8dd02d0a51695e6d8cf7ddebff88cdc216dd64 100644
--- a/third_party/leveldatabase/env_chromium.h
+++ b/third_party/leveldatabase/env_chromium.h
@@ -105,6 +105,8 @@ class ChromiumEnv : public leveldb::Env,
                     public RetrierProvider,
                     public WriteTracker {
  public:
+  ChromiumEnv();
+
   typedef void(ScheduleFunc)(void*);
 
   static bool MakeBackup(const std::string& fname);
@@ -130,27 +132,33 @@ class ChromiumEnv : public leveldb::Env,
   virtual leveldb::Status GetTestDirectory(std::string* path);
   virtual uint64_t NowMicros();
   virtual void SleepForMicroseconds(int micros);
+  virtual leveldb::Status NewSequentialFile(const std::string& fname,
+                                            leveldb::SequentialFile** result);
+  virtual leveldb::Status NewRandomAccessFile(
+      const std::string& fname,
+      leveldb::RandomAccessFile** result);
+  virtual leveldb::Status NewWritableFile(const std::string& fname,
+                                          leveldb::WritableFile** result);
+  virtual leveldb::Status NewLogger(const std::string& fname,
+                                    leveldb::Logger** result);
 
  protected:
-  ChromiumEnv();
+  virtual void DidSyncDir(const std::string& fname);
+
+  std::string name_;
+  bool make_backup_;
 
+ private:
   virtual void DidCreateNewFile(const std::string& fname);
   virtual bool DoesDirNeedSync(const std::string& fname);
-  virtual void DidSyncDir(const std::string& fname);
-  virtual base::File::Error GetDirectoryEntries(
-      const base::FilePath& dir_param,
-      std::vector<base::FilePath>* result) const = 0;
   virtual void RecordErrorAt(MethodID method) const;
   virtual void RecordOSError(MethodID method, int saved_errno) const;
   virtual void RecordOSError(MethodID method,
                              base::File::Error error) const;
+  void RecordOpenFilesLimit(const std::string& type);
   base::HistogramBase* GetMaxFDHistogram(const std::string& type) const;
   base::HistogramBase* GetOSErrorHistogram(MethodID method, int limit) const;
 
-  std::string name_;
-  bool make_backup_;
-
- private:
   // File locks may not be exclusive within a process (e.g. on POSIX). Track
   // locks held by the ChromiumEnv to prevent access within the process.
   class LockTable {