[components] Switch {RefCounted}ProfileKeyedService to use BrowserContext

chrome/browser/download/download_service_factory.cc

Index: chrome/browser/download/download_service_factory.cc
diff --git a/chrome/browser/download/download_service_factory.cc b/chrome/browser/download/download_service_factory.cc
index 192db824b4fe5d95301f514a84595176162a1afc..f724992a098c1d9843296f78d614956aa68c3871 100644
--- a/chrome/browser/download/download_service_factory.cc
+++ b/chrome/browser/download/download_service_factory.cc
@@ -30,8 +30,9 @@ DownloadServiceFactory::~DownloadServiceFactory() {
 }
 
 ProfileKeyedService* DownloadServiceFactory::BuildServiceInstanceFor(
-    Profile* profile) const {
-  DownloadService* service = new DownloadService(profile);
+    content::BrowserContext* profile) const {
+  DownloadService* service =
+      new DownloadService(static_cast<Profile*>(profile));
 
   // No need for initialization; initialization can be done on first
   // use of service.