Feedv2: Terminate background task if not enabled

If the feature isn't enabled, make sure the background task
doesn't keep running.

Bug: 1044139
Change-Id: If1b9760c38570e3d278ebf078732859cdc941b45
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2191271
Commit-Queue: Dan H <harringtond@chromium.org>
Auto-Submit: Dan H <harringtond@chromium.org>
Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#769929}

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

@@ -7,9 +7,12 @@
 #include <utility>
 
 #include "base/check.h"
+#include "base/feature_list.h"
 #include "chrome/browser/android/feed/v2/feed_service_factory.h"
 #include "chrome/browser/android/feed/v2/refresh_task_scheduler_impl.h"
+#include "chrome/browser/profiles/profile.h"
 #include "components/feed/core/v2/public/feed_service.h"
+#include "components/feed/feed_feature_list.h"
 
 namespace feed {
 
@@ -47,6 +50,10 @@ bool BackgroundRefreshTask::OnStopTask(
 // Kicks off the Feed refresh. Called only after the full browser is started.
 void BackgroundRefreshTask::Run(background_task::TaskFinishedCallback callback,
                                 content::BrowserContext* browser_context) {
+  if (!FeedService::IsEnabled(
+          *Profile::FromBrowserContext(browser_context)->GetPrefs()))
+    return std::move(callback).Run(false);
+
   FeedService* service =
       FeedServiceFactory::GetForBrowserContext(browser_context);
   if (!service)

components/feed/core/v2/public/feed_service.cc

@@ -9,14 +9,17 @@
 #include "base/time/default_clock.h"
 #include "base/time/default_tick_clock.h"
 #include "build/build_config.h"
+#include "components/feed/core/shared_prefs/pref_names.h"
 #include "components/feed/core/v2/feed_network_impl.h"
 #include "components/feed/core/v2/feed_store.h"
 #include "components/feed/core/v2/feed_stream.h"
 #include "components/feed/core/v2/metrics_reporter.h"
 #include "components/feed/core/v2/refresh_task_scheduler.h"
+#include "components/feed/feed_feature_list.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/history/core/browser/history_service_observer.h"
 #include "components/history/core/browser/history_types.h"
+#include "components/prefs/pref_service.h"
 #include "net/base/network_change_notifier.h"
 #include "services/network/public/cpp/shared_url_loader_factory.h"
 
@@ -174,6 +177,12 @@ void FeedService::ClearCachedData() {
   stream_->OnCacheDataCleared();
 }
 
+// static
+bool FeedService::IsEnabled(const PrefService& pref_service) {
+  return base::FeatureList::IsEnabled(feed::kInterestFeedV2) &&
+         pref_service.GetBoolean(feed::prefs::kEnableSnippets);
+}
+
 #if defined(OS_ANDROID)
 void FeedService::OnApplicationStateChange(
     base::android::ApplicationState state) {

components/feed/core/v2/public/feed_service.h

@@ -90,6 +90,9 @@ class FeedService : public KeyedService {
     return refresh_task_scheduler_.get();
   }
 
+  // Whether Feedv2 is enabled. If false, the FeedService should not be created.
+  static bool IsEnabled(const PrefService& pref_service);
+
  private:
   class StreamDelegateImpl;
   class NetworkDelegateImpl;