[fsp] Pass more detailed errors to the providing extension.

chrome/browser/chromeos/file_system_provider/request_manager.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/request_manager.h"
 
 #include "base/debug/trace_event.h"
 #include "base/files/file.h"
 #include "base/stl_util.h"
 
@@ skipping 101 matching lines @@
   if (!request->handler->Execute(request_id)) {
     DestroyRequest(request_id);
     return 0;
   }
 
   FOR_EACH_OBSERVER(Observer, observers_, OnRequestExecuted(request_id));
 
   return request_id;
 }
 
-bool RequestManager::FulfillRequest(int request_id,
-                                    scoped_ptr<RequestValue> response,
-                                    bool has_more) {
+base::File::Error RequestManager::FulfillRequest(
+    int request_id,
+    scoped_ptr<RequestValue> response,
+    bool has_more) {
   CHECK(response.get());
   RequestMap::iterator request_it = requests_.find(request_id);
   if (request_it == requests_.end())
-    return false;
+    return base::File::FILE_ERROR_NOT_FOUND;
 
   FOR_EACH_OBSERVER(Observer,
                     observers_,
                     OnRequestFulfilled(request_id, *response.get(), has_more));
 
   request_it->second->handler->OnSuccess(request_id, response.Pass(), has_more);
 
   if (!has_more) {
     DestroyRequest(request_id);
   } else {
     if (notification_manager_)
       notification_manager_->HideUnresponsiveNotification(request_id);
     ResetTimer(request_id);
   }
 
-  return true;
+  return base::File::FILE_OK;
 }
 
-bool RequestManager::RejectRequest(int request_id,
-                                   scoped_ptr<RequestValue> response,
-                                   base::File::Error error) {
+base::File::Error RequestManager::RejectRequest(
+    int request_id,
+    scoped_ptr<RequestValue> response,
+    base::File::Error error) {
   CHECK(response.get());
   RequestMap::iterator request_it = requests_.find(request_id);
   if (request_it == requests_.end())
-    return false;
+    return base::File::FILE_ERROR_NOT_FOUND;
 
   FOR_EACH_OBSERVER(Observer,
                     observers_,
                     OnRequestRejected(request_id, *response.get(), error));
   request_it->second->handler->OnError(request_id, response.Pass(), error);
   DestroyRequest(request_id);
 
-  return true;
+  return base::File::FILE_OK;
 }
 
 void RequestManager::SetTimeoutForTesting(const base::TimeDelta& timeout) {
   timeout_ = timeout;
 }
 
 std::vector<int> RequestManager::GetActiveRequestIds() const {
   std::vector<int> result;
 
   for (RequestMap::const_iterator request_it = requests_.begin();
@@ skipping 78 matching lines @@
     notification_manager_->HideUnresponsiveNotification(request_id);
 
   FOR_EACH_OBSERVER(Observer, observers_, OnRequestDestroyed(request_id));
 
   TRACE_EVENT_ASYNC_END0(
       "file_system_provider", "RequestManager::Request", request_id);
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos