feedv2: don't create service if disabled

We were accidentally creating the service to check if it
should be enabled.

Bug: 1092633
Change-Id: I63013b4b11da3f5ce39f78cd0f3895a50e7af316
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2236638
Auto-Submit: Dan H <harringtond@chromium.org>
Commit-Queue: Dan H <harringtond@chromium.org>
Commit-Queue: Ian Wells <iwells@chromium.org>
Reviewed-by: Ian Wells <iwells@chromium.org>
Cr-Commit-Position: refs/heads/master@{#776335}

chrome/browser/android/feed/v2/feed_service_bridge.cc

@@ -41,8 +41,7 @@ DisplayMetrics FeedServiceBridge::GetDisplayMetrics() {
 
 bool FeedServiceBridge::IsEnabled() {
   Profile* profile = ProfileManager::GetLastUsedProfile();
-  return FeedServiceFactory::GetForBrowserContext(profile)->IsEnabled(
-      *profile->GetPrefs());
+  return FeedService::IsEnabled(*profile->GetPrefs());
 }
 
 }  // namespace feed