[fsp] Add support for observing entries and notifying about changes.

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_ABORT_H_
-#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_ABORT_H_
+#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 {
 
-// Aborts an operation. Created per request.
-class Abort : public Operation {
+// Unobserves an entry at |entry_path|.
+class UnobserveEntry : public Operation {
  public:
-  Abort(extensions::EventRouter* event_router,
-        const ProvidedFileSystemInfo& file_system_info,
-        int operation_request_id,
-        const storage::AsyncFileUtil::StatusCallback& callback);
-  virtual ~Abort();
+  UnobserveEntry(extensions::EventRouter* event_router,
+                 const ProvidedFileSystemInfo& file_system_info,
+                 const base::FilePath& entry_path,
+                 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:
-  int operation_request_id_;
+  const base::FilePath entry_path_;
   const storage::AsyncFileUtil::StatusCallback callback_;
 
-  DISALLOW_COPY_AND_ASSIGN(Abort);
+  DISALLOW_COPY_AND_ASSIGN(UnobserveEntry);
 };
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos
 
-#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_ABORT_H_
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_UNOBSERVE_ENTRY_H_