Add the boilerplate for actions to File System Provider API.

chrome/browser/chromeos/file_system_provider/fake_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/fake_provided_file_system.h"
 
 #include "base/thread_task_runner_handle.h"
 #include "net/base/io_buffer.h"
 
 namespace chromeos {
@@ skipping 91 matching lines @@
   metadata->name = entry_it->second->metadata->name;
   metadata->size = entry_it->second->metadata->size;
   metadata->modification_time = entry_it->second->metadata->modification_time;
   metadata->mime_type = entry_it->second->metadata->mime_type;
   metadata->thumbnail = entry_it->second->metadata->thumbnail;
 
   return PostAbortableTask(
       base::Bind(callback, base::Passed(&metadata), base::File::FILE_OK));
 }
 
+AbortCallback FakeProvidedFileSystem::GetActions(
+    const base::FilePath& entry_path,
+    const ProvidedFileSystemInterface::GetActionsCallback& callback) {
+  // TODO(mtomasz): Implement it once needed.
+  const std::vector<Action> actions;
+  return PostAbortableTask(base::Bind(callback, actions, base::File::FILE_OK));
+}
+
 AbortCallback FakeProvidedFileSystem::ReadDirectory(
     const base::FilePath& directory_path,
     const storage::AsyncFileUtil::ReadDirectoryCallback& callback) {
   storage::AsyncFileUtil::EntryList entry_list;
 
   for (Entries::const_iterator it = entries_.begin(); it != entries_.end();
        ++it) {
     const base::FilePath file_path = it->first;
     if (file_path == directory_path || directory_path.IsParent(file_path)) {
       const EntryMetadata* const metadata = it->second->metadata.get();
@@ skipping 279 matching lines @@
 }
 
 void FakeProvidedFileSystem::AbortMany(const std::vector<int>& task_ids) {
   for (size_t i = 0; i < task_ids.size(); ++i) {
     tracker_.TryCancel(task_ids[i]);
   }
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos