Store BackgroundFetchRequestInfo in a refcounted pointer

content/browser/background_fetch/background_fetch_service_unittest.cc

Index: content/browser/background_fetch/background_fetch_service_unittest.cc
diff --git a/content/browser/background_fetch/background_fetch_service_unittest.cc b/content/browser/background_fetch/background_fetch_service_unittest.cc
index 330f53bc8b2864b7289c928ec18cce2f08cadc16..70148387b8a13a293f923353fa90da1ba1ac2283 100644
--- a/content/browser/background_fetch/background_fetch_service_unittest.cc
+++ b/content/browser/background_fetch/background_fetch_service_unittest.cc
@@ -240,6 +240,8 @@ class BackgroundFetchServiceTest : public BackgroundFetchTestBase {
   void TearDown() override {
     service_.reset();
 
+    EXPECT_CALL(*download_manager_, Shutdown()).Times(1);
+
     context_->Shutdown();
     context_ = nullptr;