Add ContentSuggestionsService

chrome/browser/ntp_snippets/content_suggestions_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_service_factory.h"
+
+#include "base/feature_list.h"
+#include "base/memory/singleton.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/pref_names.h"
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "components/ntp_snippets/content_suggestions_service.h"
+#include "components/prefs/pref_service.h"
+#include "content/public/browser/browser_context.h"
+
+#if defined(OS_ANDROID)
+#include "chrome/browser/android/chrome_feature_list.h"
+#endif  // OS_ANDROID
+
+// static
+ContentSuggestionsServiceFactory*
+ContentSuggestionsServiceFactory::GetInstance() {
+  return base::Singleton<ContentSuggestionsServiceFactory>::get();
+}
+
+// static
+ntp_snippets::ContentSuggestionsService*
+ContentSuggestionsServiceFactory::GetForProfile(Profile* profile) {
+  DCHECK(!profile->IsOffTheRecord());
+  return static_cast<ntp_snippets::ContentSuggestionsService*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true));
+}
+
+ContentSuggestionsServiceFactory::ContentSuggestionsServiceFactory()
+    : BrowserContextKeyedServiceFactory(
+          "ContentSuggestionsService",
+          BrowserContextDependencyManager::GetInstance()) {}
+
+ContentSuggestionsServiceFactory::~ContentSuggestionsServiceFactory() {}
+
+KeyedService* ContentSuggestionsServiceFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  // TODO(mvanouwerkerk): Move the enable logic into the service once we start
+  // observing pref changes.
+  bool enabled = true;
+#if defined(OS_ANDROID)
+  enabled = enabled &&
+            base::FeatureList::IsEnabled(chrome::android::kNTPSnippetsFeature);

[Marc Treib, 2016/06/30 10:36:53]

Please add a TODO to split the feature.

[Philipp Keck, 2016/06/30 17:14:07]

I added the TODO, a corresponding CL is already prepared.

+#endif  // OS_ANDROID
+
+  return new ntp_snippets::ContentSuggestionsService(enabled);
+}