Add |SetImageDownloadLimit| to ImageFetcher to limit downloaded bytes

components/suggestions/image_manager_unittest.cc

Index: components/suggestions/image_manager_unittest.cc
diff --git a/components/suggestions/image_manager_unittest.cc b/components/suggestions/image_manager_unittest.cc
index 81c1e47627b93e1d615b4cc11262390c0637ee26..e9c139eb9a0a220caab58489d9024aaf4341ea52 100644
--- a/components/suggestions/image_manager_unittest.cc
+++ b/components/suggestions/image_manager_unittest.cc
@@ -54,6 +54,8 @@ class MockImageFetcher : public ImageFetcher {
                     const 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*());
 };