Post notification after fetching articles

chrome/browser/ntp_snippets/content_suggestions_notifier_service_factory.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ntp_snippets/content_suggestions_notifier_service_factory.h"
+
+#include "base/memory/ptr_util.h"
+#include "base/memory/singleton.h"
+#include "chrome/browser/ntp_snippets/content_suggestions_service_factory.h"
+#include "chrome/browser/profiles/profile.h"
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "components/variations/variations_associated_data.h"
+
+#if defined(OS_ANDROID)
+#include "chrome/browser/android/ntp//content_suggestions_notifier_service.h"
+
+const base::Feature kContentSuggestionsNotificationsFeature = {
+    "ContentSuggestionsNotifications", base::FEATURE_DISABLED_BY_DEFAULT};
+#endif
+
+ContentSuggestionsNotifierServiceFactory*
+ContentSuggestionsNotifierServiceFactory::GetInstance() {
+  return base::Singleton<ContentSuggestionsNotifierServiceFactory>::get();
+}
+
+ContentSuggestionsNotifierService*
+ContentSuggestionsNotifierServiceFactory::GetForProfile(Profile* profile) {
+#if defined(OS_ANDROID)
+  return static_cast<ContentSuggestionsNotifierService*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true));
+#else
+  return nullptr;
+#endif
+}
+
+ContentSuggestionsNotifierService*
+ContentSuggestionsNotifierServiceFactory::GetForProfileIfExists(
+    Profile* profile) {
+#if defined(OS_ANDROID)
+  return static_cast<ContentSuggestionsNotifierService*>(
+      GetInstance()->GetServiceForBrowserContext(profile, false));
+#else
+  return nullptr;
+#endif
+}
+
+ContentSuggestionsNotifierServiceFactory::
+    ContentSuggestionsNotifierServiceFactory()
+    : BrowserContextKeyedServiceFactory(
+          "ContentSuggestionsNotifierService",
+          BrowserContextDependencyManager::GetInstance()) {
+  DependsOn(ContentSuggestionsServiceFactory::GetInstance());
+}
+
+ContentSuggestionsNotifierServiceFactory::
+    ~ContentSuggestionsNotifierServiceFactory() = default;
+
+// BrowserContextKeyedServiceFactory implementation.
+KeyedService* ContentSuggestionsNotifierServiceFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+#if defined(OS_ANDROID)
+  if (base::FeatureList::IsEnabled(kContentSuggestionsNotificationsFeature)) {
+    Profile* profile = Profile::FromBrowserContext(context);
+    auto suggestions = ContentSuggestionsServiceFactory::GetForProfile(profile);

[Bernhard Bauer, 2017/01/03 17:38:59]

Nit: The type of |suggestions| isn't totally obvious, so I'd rather spell it
out.

[sfiera, 2017/01/03 23:13:55]

Done.

+    return new ContentSuggestionsNotifierService(profile, suggestions,
+                                                 profile->GetPrefs());
+  }
+#endif
+  return nullptr;
+}