[components] Switch {RefCounted}ProfileKeyedService to use BrowserContext

chrome/browser/user_style_sheet_watcher_factory.cc

Index: chrome/browser/user_style_sheet_watcher_factory.cc
diff --git a/chrome/browser/user_style_sheet_watcher_factory.cc b/chrome/browser/user_style_sheet_watcher_factory.cc
index f0f6b9299467ed272f83b1272874bce373c1c89f..64367fc8dc8d8a3fa11c313305f677788db1378c 100644
--- a/chrome/browser/user_style_sheet_watcher_factory.cc
+++ b/chrome/browser/user_style_sheet_watcher_factory.cc
@@ -30,7 +30,9 @@ UserStyleSheetWatcherFactory::~UserStyleSheetWatcherFactory() {
 }
 
 scoped_refptr<RefcountedProfileKeyedService>
-UserStyleSheetWatcherFactory::BuildServiceInstanceFor(Profile* profile) const {
+UserStyleSheetWatcherFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  Profile* profile = static_cast<Profile*>(context);
   scoped_refptr<UserStyleSheetWatcher> user_style_sheet_watcher(
       new UserStyleSheetWatcher(profile, profile->GetPath()));
   user_style_sheet_watcher->Init();