[fsp] Decouple file_service_provider::Service.

chrome/browser/chromeos/file_system_provider/provided_file_system.cc

 // 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/provided_file_system.h"
 
+#include "base/files/file.h"
+#include "base/values.h"
+#include "chrome/browser/chromeos/file_system_provider/request_manager.h"
+#include "chrome/common/extensions/api/file_system_provider.h"
+#include "extensions/browser/event_router.h"
+
 namespace chromeos {
 namespace file_system_provider {
+namespace {
 
-ProvidedFileSystem::ProvidedFileSystem() {}
+// Creates values to be passed to request events. These values can be extended
+// by additional fields.
+scoped_ptr<base::ListValue> CreateRequestValues(int file_system_id,
+                                                int request_id) {
+  scoped_ptr<base::ListValue> values(new base::ListValue());
+  values->AppendInteger(file_system_id);
+  values->AppendInteger(request_id);
+  return values.Pass();
+}
 
-ProvidedFileSystem::ProvidedFileSystem(const std::string& extension_id,
-                                       int file_system_id,
-                                       const std::string& file_system_name,
-                                       const base::FilePath& mount_path)
-    : extension_id_(extension_id),
-      file_system_id_(file_system_id),
-      file_system_name_(file_system_name),
-      mount_path_(mount_path) {}
+// Forwards the success callback to the status callback. Ignores arguments,
+// since unmount request does not provide arguments.
+void OnRequestUnmountSuccess(
+    const fileapi::AsyncFileUtil::StatusCallback& callback,
+    scoped_ptr<base::DictionaryValue> /* result */,
+    bool /* has_next */) {
+  callback.Run(base::File::FILE_OK);
+}
+
+}  // namespace
+
+ProvidedFileSystem::ProvidedFileSystem(
+    extensions::EventRouter* event_router,
+    RequestManager* request_manager,
+    const ProvidedFileSystemInfo& file_system_info)
+    : event_router_(event_router),
+      request_manager_(request_manager),
+      file_system_info_(file_system_info) {}
 
 ProvidedFileSystem::~ProvidedFileSystem() {}
 
+bool ProvidedFileSystem::RequestUnmount(
+    const fileapi::AsyncFileUtil::StatusCallback& callback) {
+  int request_id = request_manager_->CreateRequest(
+      file_system_info_.extension_id(),
+      file_system_info_.file_system_id(),
+      base::Bind(&OnRequestUnmountSuccess, callback),
+      callback);
+
+  if (!request_id)
+    return false;
+
+  scoped_ptr<base::ListValue> values(
+      CreateRequestValues(file_system_info_.file_system_id(), request_id));
+
+  event_router_->DispatchEventToExtension(
+      file_system_info_.extension_id(),
+      make_scoped_ptr(new extensions::Event(
+          extensions::api::file_system_provider::OnUnmountRequested::kEventName,
+          values.Pass())));
+
+  return true;
+}
+
+const ProvidedFileSystemInfo& ProvidedFileSystem::GetFileSystemInfo() const {
+  return file_system_info_;
+}
+
 }  // namespace file_system_provider
 }  // namespace chromeos