Add the boilerplate for actions to File System Provider API.

chrome/browser/chromeos/file_system_provider/throttled_file_system.cc

Index: chrome/browser/chromeos/file_system_provider/throttled_file_system.cc
diff --git a/chrome/browser/chromeos/file_system_provider/throttled_file_system.cc b/chrome/browser/chromeos/file_system_provider/throttled_file_system.cc
index 6679e37dca0f56ee7109b8c3045c448c1a320703..99eef128ccaf6924c976139be05d88a6f4df3e4f 100644
--- a/chrome/browser/chromeos/file_system_provider/throttled_file_system.cc
+++ b/chrome/browser/chromeos/file_system_provider/throttled_file_system.cc
@@ -38,6 +38,12 @@ AbortCallback ThrottledFileSystem::GetMetadata(
   return file_system_->GetMetadata(entry_path, fields, callback);
 }
 
+AbortCallback ThrottledFileSystem::GetActions(
+    const base::FilePath& entry_path,
+    const GetActionsCallback& callback) {
+  return file_system_->GetActions(entry_path, callback);
+}
+
 AbortCallback ThrottledFileSystem::ReadDirectory(
     const base::FilePath& directory_path,
     const storage::AsyncFileUtil::ReadDirectoryCallback& callback) {