[fsp] Use auto generated methods for generating dictionaries.

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

Index: chrome/browser/chromeos/file_system_provider/operations/unmount_unittest.cc
diff --git a/chrome/browser/chromeos/file_system_provider/operations/unmount_unittest.cc b/chrome/browser/chromeos/file_system_provider/operations/unmount_unittest.cc
index 37956e6f8c191d5ad0024929c8d3135b71a3dce0..000921bdd21d3940fe4bfbc2c4e2668ff19bb4d2 100644
--- a/chrome/browser/chromeos/file_system_provider/operations/unmount_unittest.cc
+++ b/chrome/browser/chromeos/file_system_provider/operations/unmount_unittest.cc
@@ -46,6 +46,8 @@ class FileSystemProviderOperationsUnmountTest : public testing::Test {
 };
 
 TEST_F(FileSystemProviderOperationsUnmountTest, Execute) {
+  using extensions::api::file_system_provider::UnmountRequestedOptions;
+
   util::LoggingDispatchEventImpl dispatcher(true /* dispatch_reply */);
   util::StatusCallbackLog callback_log;
 
@@ -66,16 +68,13 @@ TEST_F(FileSystemProviderOperationsUnmountTest, Execute) {
   base::ListValue* event_args = event->event_args.get();
   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(options->GetString("fileSystemId", &event_file_system_id));
-  EXPECT_EQ(kFileSystemId, event_file_system_id);
+  const base::DictionaryValue* options_as_value = NULL;
+  ASSERT_TRUE(event_args->GetDictionary(0, &options_as_value));
 
-  int event_request_id = -1;
-  EXPECT_TRUE(options->GetInteger("requestId", &event_request_id));
-  EXPECT_EQ(kRequestId, event_request_id);
+  UnmountRequestedOptions options;
+  ASSERT_TRUE(UnmountRequestedOptions::Populate(*options_as_value, &options));
+  EXPECT_EQ(kFileSystemId, options.file_system_id);
+  EXPECT_EQ(kRequestId, options.request_id);
 }
 
 TEST_F(FileSystemProviderOperationsUnmountTest, Execute_NoListener) {