Add UMA for the content suggestions settings

components/ntp_snippets/content_suggestions_service_unittest.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 "components/ntp_snippets/content_suggestions_service.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/default_clock.h"
 #include "components/ntp_snippets/category_info.h"
 #include "components/ntp_snippets/category_rankers/constant_category_ranker.h"
 #include "components/ntp_snippets/category_rankers/fake_category_ranker.h"
 #include "components/ntp_snippets/category_rankers/mock_category_ranker.h"
 #include "components/ntp_snippets/category_status.h"
 #include "components/ntp_snippets/content_suggestion.h"
 #include "components/ntp_snippets/content_suggestions_provider.h"
 #include "components/ntp_snippets/mock_content_suggestions_provider.h"
+#include "components/ntp_snippets/remote/remote_suggestions_provider_impl.h"
 #include "components/ntp_snippets/user_classifier.h"
 #include "components/prefs/testing_pref_service.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/image/image.h"
 
 using testing::_;
 using testing::ElementsAre;
 using testing::Eq;
 using testing::InvokeWithoutArgs;
@@ skipping 98 matching lines @@
 
   void SetCategoryRanker(std::unique_ptr<CategoryRanker> category_ranker) {
     category_ranker_ = std::move(category_ranker);
   }
 
   MOCK_METHOD1(OnImageFetched, void(const gfx::Image&));
 
  protected:
   void RegisterPrefs() {
     ContentSuggestionsService::RegisterProfilePrefs(pref_service_->registry());
+    RemoteSuggestionsProviderImpl::RegisterProfilePrefs(
+        pref_service_->registry());
     UserClassifier::RegisterProfilePrefs(pref_service_->registry());
   }
 
   void CreateContentSuggestionsService(
       ContentSuggestionsService::State enabled) {
     ASSERT_FALSE(service_);
 
     // TODO(jkrcal): Replace by a mock.
     auto user_classifier = base::MakeUnique<UserClassifier>(
         pref_service_.get(), base::MakeUnique<base::DefaultClock>());
@@ skipping 654 matching lines @@
   Category category = Category::FromKnownCategory(KnownCategories::BOOKMARKS);
   MockContentSuggestionsProvider* provider =
       MakeRegisteredMockProvider(category);
   provider->FireCategoryStatusChangedWithCurrentStatus(category);
 
   EXPECT_CALL(*raw_mock_ranker, OnCategoryDismissed(category));
   service()->DismissCategory(category);
 }
 
 }  // namespace ntp_snippets