Dispatch a bare Service Worker event for a finished Background Fetch

content/browser/background_fetch/background_fetch_service_impl.h

Index: content/browser/background_fetch/background_fetch_service_impl.h
diff --git a/content/browser/background_fetch/background_fetch_service_impl.h b/content/browser/background_fetch/background_fetch_service_impl.h
index 82989cd4654168e250ee0148315243c890cf0101..c2d6f32b218882bc82c4bf84051755cf45426797 100644
--- a/content/browser/background_fetch/background_fetch_service_impl.h
+++ b/content/browser/background_fetch/background_fetch_service_impl.h
@@ -12,6 +12,7 @@
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/modules/background_fetch/background_fetch.mojom.h"
 
 namespace url {
@@ -24,7 +25,8 @@ class BackgroundFetchContext;
 struct BackgroundFetchOptions;
 struct ServiceWorkerFetchRequest;
 
-class BackgroundFetchServiceImpl : public blink::mojom::BackgroundFetchService {
+class CONTENT_EXPORT BackgroundFetchServiceImpl
+    : public blink::mojom::BackgroundFetchService {
  public:
   BackgroundFetchServiceImpl(
       int render_process_id,