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

chrome/browser/chromeos/file_system_provider/operations/unobserve_entry.cc

Index: chrome/browser/chromeos/file_system_provider/operations/unobserve_entry.cc
diff --git a/chrome/browser/chromeos/file_system_provider/operations/unobserve_entry.cc b/chrome/browser/chromeos/file_system_provider/operations/unobserve_entry.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ae2762e98664ab87378e20279537ac749a211eae
--- /dev/null
+++ b/chrome/browser/chromeos/file_system_provider/operations/unobserve_entry.cc
@@ -0,0 +1,59 @@
+// 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.
+
+#include "chrome/browser/chromeos/file_system_provider/operations/unobserve_entry.h"
+
+#include <string>
+
+#include "chrome/common/extensions/api/file_system_provider.h"
+#include "chrome/common/extensions/api/file_system_provider_internal.h"
+
+namespace chromeos {
+namespace file_system_provider {
+namespace operations {
+
+UnobserveEntry::UnobserveEntry(
+    extensions::EventRouter* event_router,
+    const ProvidedFileSystemInfo& file_system_info,
+    const base::FilePath& entry_path,
+    const storage::AsyncFileUtil::StatusCallback& callback)
+    : Operation(event_router, file_system_info),
+      entry_path_(entry_path),
+      callback_(callback) {
+}
+
+UnobserveEntry::~UnobserveEntry() {
+}
+
+bool UnobserveEntry::Execute(int request_id) {
+  using extensions::api::file_system_provider::UnobserveEntryRequestedOptions;
+
+  UnobserveEntryRequestedOptions options;
+  options.file_system_id = file_system_info_.file_system_id();
+  options.request_id = request_id;
+  options.entry_path = entry_path_.AsUTF8Unsafe();
+
+  return SendEvent(
+      request_id,
+      extensions::api::file_system_provider::OnUnobserveEntryRequested::
+          kEventName,
+      extensions::api::file_system_provider::OnUnobserveEntryRequested::Create(
+          options));
+}
+
+void UnobserveEntry::OnSuccess(int /* request_id */,
+                               scoped_ptr<RequestValue> /* result */,
+                               bool has_more) {
+  callback_.Run(base::File::FILE_OK);
+}
+
+void UnobserveEntry::OnError(int /* request_id */,
+                             scoped_ptr<RequestValue> /* result */,
+                             base::File::Error error) {
+  callback_.Run(error);
+}
+
+}  // namespace operations
+}  // namespace file_system_provider
+}  // namespace chromeos