Get signals working in the EXTRA_DATA section of MHTML

components/offline_pages/core/offline_page_model_impl.cc

Index: components/offline_pages/core/offline_page_model_impl.cc
diff --git a/components/offline_pages/core/offline_page_model_impl.cc b/components/offline_pages/core/offline_page_model_impl.cc
index 2e87035d1f69577f80997550ca96de221c845d67..394115f1ca09ee63955fbf25d24bc20d37bd7554 100644
--- a/components/offline_pages/core/offline_page_model_impl.cc
+++ b/components/offline_pages/core/offline_page_model_impl.cc
@@ -340,19 +340,22 @@ void OfflinePageModelImpl::SavePage(
     std::unique_ptr<OfflinePageArchiver> archiver,
     const SavePageCallback& callback) {
   DCHECK(is_loaded_);
+  base::FilePath empty_file_path;
 
   // Skip saving the page that is not intended to be saved, like local file
   // page.
   if (!OfflinePageModel::CanSaveURL(save_page_params.url)) {
     InformSavePageDone(callback, SavePageResult::SKIPPED,
-                       save_page_params.client_id, kInvalidOfflineId);
+                       save_page_params.client_id, kInvalidOfflineId,
+                       empty_file_path);
     return;
   }
 
   // The web contents is not available if archiver is not created and passed.
   if (!archiver.get()) {
     InformSavePageDone(callback, SavePageResult::CONTENT_UNAVAILABLE,
-                       save_page_params.client_id, kInvalidOfflineId);
+                       save_page_params.client_id, kInvalidOfflineId,
+                       empty_file_path);
     return;
   }
 
@@ -693,15 +696,15 @@ void OfflinePageModelImpl::OnCreateArchiveDone(
     // TODO(fgorski): We have created an archive for a wrong URL. It should be
     // deleted from here, once archiver has the right functionality.
     InformSavePageDone(callback, SavePageResult::ARCHIVE_CREATION_FAILED,
-                       save_page_params.client_id, offline_id);
+                       save_page_params.client_id, offline_id, file_path);
     DeletePendingArchiver(archiver);
     return;
   }
 
   if (archiver_result != ArchiverResult::SUCCESSFULLY_CREATED) {
     SavePageResult result = ToSavePageResult(archiver_result);
-    InformSavePageDone(
-        callback, result, save_page_params.client_id, offline_id);
+    InformSavePageDone(callback, result, save_page_params.client_id, offline_id,
+                       file_path);
     DeletePendingArchiver(archiver);
     return;
   }
@@ -739,7 +742,7 @@ void OfflinePageModelImpl::OnAddOfflinePageDone(
     result = SavePageResult::STORE_FAILURE;
   }
   InformSavePageDone(callback, result, offline_page.client_id,
-                     offline_page.offline_id);
+                     offline_page.offline_id, file_path);
   if (result == SavePageResult::SUCCESS) {
     DeleteExistingPagesWithSameURL(offline_page);
   } else {
@@ -854,11 +857,12 @@ void OfflinePageModelImpl::FinalizeModelLoad() {
 void OfflinePageModelImpl::InformSavePageDone(const SavePageCallback& callback,
                                               SavePageResult result,
                                               const ClientId& client_id,
-                                              int64_t offline_id) {
+                                              int64_t offline_id,
+                                              const base::FilePath& file_path) {
   ReportSavePageResultHistogramAfterSave(client_id, result);
   archive_manager_->GetStorageStats(
       base::Bind(&ReportStorageHistogramsAfterSave));
-  callback.Run(result, offline_id);
+  callback.Run(result, offline_id, file_path);
 }
 
 void OfflinePageModelImpl::DeleteExistingPagesWithSameURL(