[fsp] Group arguments for API methods and events in dictionaries.

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

Index: chrome/browser/chromeos/file_system_provider/operations/get_metadata_unittest.cc
diff --git a/chrome/browser/chromeos/file_system_provider/operations/get_metadata_unittest.cc b/chrome/browser/chromeos/file_system_provider/operations/get_metadata_unittest.cc
index b10279556c5387a736cc837edfb35cad59009b14..e62efd84bd387ec997cff616ca0019c3167f8c84 100644
--- a/chrome/browser/chromeos/file_system_provider/operations/get_metadata_unittest.cc
+++ b/chrome/browser/chromeos/file_system_provider/operations/get_metadata_unittest.cc
@@ -129,19 +129,22 @@ TEST_F(FileSystemProviderOperationsGetMetadataTest, Execute) {
       extensions::api::file_system_provider::OnGetMetadataRequested::kEventName,
       event->event_name);
   base::ListValue* event_args = event->event_args.get();
-  ASSERT_EQ(3u, event_args->GetSize());
+  ASSERT_EQ(1u, event_args->GetSize());
+
+  base::DictionaryValue* options = NULL;
+  ASSERT_TRUE(event_args->GetDictionary(0, &options));
 
   std::string event_file_system_id;
-  EXPECT_TRUE(event_args->GetString(0, &event_file_system_id));
+  EXPECT_TRUE(options->GetString("fileSystemId", &event_file_system_id));
   EXPECT_EQ(kFileSystemId, event_file_system_id);
 
   int event_request_id = -1;
-  EXPECT_TRUE(event_args->GetInteger(1, &event_request_id));
+  EXPECT_TRUE(options->GetInteger("requestId", &event_request_id));
   EXPECT_EQ(kRequestId, event_request_id);
 
-  std::string event_directory_path;
-  EXPECT_TRUE(event_args->GetString(2, &event_directory_path));
-  EXPECT_EQ(kDirectoryPath, event_directory_path);
+  std::string event_entry_path;
+  EXPECT_TRUE(options->GetString("entryPath", &event_entry_path));
+  EXPECT_EQ(kDirectoryPath, event_entry_path);
 }
 
 TEST_F(FileSystemProviderOperationsGetMetadataTest, Execute_NoListener) {