[fsp] Rename ObserveEntry with AddWatcher.

chrome/browser/chromeos/file_system_provider/operations/unobserve_entry.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 CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_UNOBSERVE_ENTRY_H_
-#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_UNOBSERVE_ENTRY_H_
-
-#include "base/files/file.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/chromeos/file_system_provider/operations/operation.h"
-#include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h"
-#include "chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h"
-#include "chrome/browser/chromeos/file_system_provider/request_value.h"
-#include "storage/browser/fileapi/async_file_util.h"
-
-namespace base {
-class FilePath;
-}  // namespace base
-
-namespace extensions {
-class EventRouter;
-}  // namespace extensions
-
-namespace chromeos {
-namespace file_system_provider {
-namespace operations {
-
-// Unobserves an entry at |entry_path|.
-class UnobserveEntry : public Operation {
- public:
-  UnobserveEntry(extensions::EventRouter* event_router,
-                 const ProvidedFileSystemInfo& file_system_info,
-                 const base::FilePath& entry_path,
-                 bool recursive,
-                 const storage::AsyncFileUtil::StatusCallback& callback);
-  virtual ~UnobserveEntry();
-
-  // Operation overrides.
-  virtual bool Execute(int request_id) override;
-  virtual void OnSuccess(int request_id,
-                         scoped_ptr<RequestValue> result,
-                         bool has_more) override;
-  virtual void OnError(int request_id,
-                       scoped_ptr<RequestValue> result,
-                       base::File::Error error) override;
-
- private:
-  const base::FilePath entry_path_;
-  bool recursive_;
-  const storage::AsyncFileUtil::StatusCallback callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(UnobserveEntry);
-};
-
-}  // namespace operations
-}  // namespace file_system_provider
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_UNOBSERVE_ENTRY_H_