Add |SetImageDownloadLimit| to ImageFetcher to limit downloaded bytes

chrome/browser/chromeos/hats/hats_notification_controller_unittest.cc

Index: chrome/browser/chromeos/hats/hats_notification_controller_unittest.cc
diff --git a/chrome/browser/chromeos/hats/hats_notification_controller_unittest.cc b/chrome/browser/chromeos/hats/hats_notification_controller_unittest.cc
index b1358f7b937b1dedf92b0526248420af1a43b43c..882625d83de0b46050a7d48dc74155360a41095c 100644
--- a/chrome/browser/chromeos/hats/hats_notification_controller_unittest.cc
+++ b/chrome/browser/chromeos/hats/hats_notification_controller_unittest.cc
@@ -77,6 +77,8 @@ class MockImageFetcher : public image_fetcher::ImageFetcher {
                     const ImageFetcher::ImageFetcherCallback&));
   MOCK_METHOD1(SetImageFetcherDelegate, void(ImageFetcherDelegate*));
   MOCK_METHOD1(SetDataUseServiceName, void(DataUseServiceName));
+  MOCK_METHOD1(SetImageDownloadLimit,
+               void(base::Optional<int64_t> max_download_bytes));
   MOCK_METHOD1(SetDesiredImageFrameSize, void(const gfx::Size&));
   MOCK_METHOD0(GetImageDecoder, image_fetcher::ImageDecoder*());