Adds API tests for listRemovableStorageDevices

chrome/browser/extensions/api/image_writer_private/removable_storage_provider_win.cc

Index: chrome/browser/extensions/api/image_writer_private/removable_storage_provider_win.cc
diff --git a/chrome/browser/extensions/api/image_writer_private/removable_storage_provider_win.cc b/chrome/browser/extensions/api/image_writer_private/removable_storage_provider_win.cc
index cfd232431dc0b9eda5b3fcaca4f9e3876fc2ac51..ffac02d3b772fa6eaa24f9b2ad207b51a3498c47 100644
--- a/chrome/browser/extensions/api/image_writer_private/removable_storage_provider_win.cc
+++ b/chrome/browser/extensions/api/image_writer_private/removable_storage_provider_win.cc
@@ -18,7 +18,7 @@ namespace {
 
 bool AddDeviceInfo(HANDLE interface_enumerator,
                    SP_DEVICE_INTERFACE_DATA* interface_data,
-                   StorageDeviceList* device_list) {
+                   scoped_refptr<StorageDeviceList> device_list) {
   // Get the required buffer size by calling with a null output buffer.
   DWORD interface_detail_data_size;
   BOOL status = SetupDiGetDeviceInterfaceDetail(
@@ -149,7 +149,10 @@ bool AddDeviceInfo(HANDLE interface_enumerator,
   return true;
 }
 
-bool PopulateList(StorageDeviceList* device_list) {
+}  // namespace
+
+bool RemovableStorageProvider::PopulateDeviceList(
+    scoped_refptr<StorageDeviceList> device_list) {
   HDEVINFO interface_enumerator = SetupDiGetClassDevs(
       &DiskClassGuid,
       NULL, // Enumerator.
@@ -188,16 +191,4 @@ bool PopulateList(StorageDeviceList* device_list) {
   return true;
 }
 
-}  // namespace
-
-void RemovableStorageProvider::GetAllDevices(DeviceListReadyCallback callback) {
-  scoped_refptr<StorageDeviceList> device_list(new StorageDeviceList());
-
-  if (PopulateList(device_list.get())) {
-    callback.Run(device_list, true);
-  } else {
-    callback.Run(device_list, false);
-  }
-}
-
 } // namespace extensions