[SyncFS] Add generic result reciever

chrome/browser/sync_file_system/sync_file_system_test_util.cc

Index: chrome/browser/sync_file_system/sync_file_system_test_util.cc
diff --git a/chrome/browser/sync_file_system/sync_file_system_test_util.cc b/chrome/browser/sync_file_system/sync_file_system_test_util.cc
index 20f6bd65e7e054dd559b44df9d5cbf1d55868411..4c05f1bf4a59ef0913186fffc3df6f9a7afb981f 100644
--- a/chrome/browser/sync_file_system/sync_file_system_test_util.cc
+++ b/chrome/browser/sync_file_system/sync_file_system_test_util.cc
@@ -9,14 +9,21 @@
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
+#include "chrome/browser/google_apis/gdata_errorcode.h"
+#include "chrome/browser/sync_file_system/drive_backend/metadata_database.h"
 #include "chrome/browser/sync_file_system/sync_status_code.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_utils.h"
+#include "testing/gtest/include/gtest/gtest.h"
 
 using content::BrowserThread;
 
 namespace sync_file_system {
 
+namespace drive_backend {
+class MetadataDatabase;
+}  // drive_backend
+
 template <typename R>
 void AssignAndQuit(base::RunLoop* run_loop, R* result_out, R result) {
   DCHECK(result_out);
@@ -30,8 +37,53 @@ AssignAndQuitCallback(base::RunLoop* run_loop, R* result) {
   return base::Bind(&AssignAndQuit<R>, run_loop, base::Unretained(result));
 }
 
+template <typename Arg>
+void ReceiveResult1(bool* done, Arg* arg_out, Arg arg) {
+  EXPECT_FALSE(*done);
+  *done = true;
+  *arg_out = base::internal::CallbackForward(arg);
+}
+
+template <typename Arg1, typename Arg2>
+void ReceiveResult2(bool* done,
+                    Arg1* arg1_out,
+                    Arg2* arg2_out,
+                    Arg1 arg1,
+                    Arg2 arg2) {
+  EXPECT_FALSE(*done);
+  *done = true;
+  *arg1_out = base::internal::CallbackForward(arg1);
+  *arg2_out = base::internal::CallbackForward(arg2);
+}
+
+template <typename Arg>
+base::Callback<void(Arg)> CreateResultReceiver(Arg* arg_out) {
+  return base::Bind(&ReceiveResult1<Arg>,
+                    base::Owned(new bool(false)), arg_out);
+}
+
+template <typename Arg1, typename Arg2>
+base::Callback<void(Arg1, Arg2)> CreateResultReceiver(Arg1* arg1_out,
+                                                      Arg2* arg2_out) {
+  return base::Bind(&ReceiveResult2<Arg1, Arg2>,
+                    base::Owned(new bool(false)),
+                    arg1_out, arg2_out);
+}
+
 // Instantiate versions we know callers will need.
 template base::Callback<void(SyncStatusCode)>
 AssignAndQuitCallback(base::RunLoop*, SyncStatusCode*);
 
+#define INSTANTIATE_RECEIVER(type)                                  \
+  template base::Callback<void(type)> CreateResultReceiver(type*);
+INSTANTIATE_RECEIVER(SyncStatusCode);
+INSTANTIATE_RECEIVER(google_apis::GDataErrorCode);
+#undef INSTANTIATE_RECEIVER
+
+#define INSTANTIATE_RECEIVER(type1, type2)                \
+  template base::Callback<void(type1, scoped_ptr<type2>)> \
+  CreateResultReceiver(type1*, scoped_ptr<type2>*)
+INSTANTIATE_RECEIVER(SyncStatusCode, drive_backend::MetadataDatabase);
+#undef INSTANTIATE_RECEIVER
+
 }  // namespace sync_file_system