Move FindEntryDelegate and friends to separate file.

chrome/browser/chromeos/gdata/find_entry_delegate.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 CHROME_BROWSER_CHROMEOS_GDATA_FIND_ENTRY_DELEGATE_H_
+#define CHROME_BROWSER_CHROMEOS_GDATA_FIND_ENTRY_DELEGATE_H_
+#pragma once
+
+#include "base/bind.h"
+#include "base/platform_file.h"
+
+class FilePath;
+
+namespace gdata {
+
+class GDataEntry;
+
+// Used to get result of file search. Please note that |file| is a live
+// object provided to this callback under lock. It must not be used outside
+// of the callback method. This callback can be invoked on different thread
+// than one that started the request.
+typedef base::Callback<void(base::PlatformFileError error,
+                            const FilePath& directory_path,
+                            GDataEntry* entry)>
+    FindEntryCallback;
+
+// Delegate class used to deal with results synchronous read-only search
+// over virtual file system.
+class FindEntryDelegate {
+ public:
+  virtual ~FindEntryDelegate();
+
+  // Called when FindEntryByPathSync() completes search.
+  virtual void OnDone(base::PlatformFileError error,
+                      const FilePath& directory_path,
+                      GDataEntry* entry) = 0;
+};
+
+// Delegate used to find a directory element for file system updates.
+class ReadOnlyFindEntryDelegate : public FindEntryDelegate {
+ public:
+  ReadOnlyFindEntryDelegate();
+
+  // Returns found entry.
+  GDataEntry* entry() { return entry_; }
+
+ private:
+  // FindEntryDelegate overrides.
+  virtual void OnDone(base::PlatformFileError error,
+                      const FilePath& directory_path,
+                      GDataEntry* entry) OVERRIDE;
+
+  // Entry that was found.
+  GDataEntry* entry_;
+};
+
+// FindEntryCallbackRelayDelegate class implementation.
+// This class is used to relay calls between sync and async versions
+// of FindFileByPath(Sync|Async) calls.
+class FindEntryCallbackRelayDelegate : public FindEntryDelegate {
+ public:
+  explicit FindEntryCallbackRelayDelegate(const FindEntryCallback& callback);
+  virtual ~FindEntryCallbackRelayDelegate();
+
+ private:
+  // FindEntryDelegate overrides.
+  virtual void OnDone(base::PlatformFileError error,
+                      const FilePath& directory_path,
+                      GDataEntry* entry) OVERRIDE;
+
+  const FindEntryCallback callback_;
+};
+
+}  // namespace gdata
+
+#endif  // CHROME_BROWSER_CHROMEOS_GDATA_FIND_ENTRY_DELEGATE_H_