Adding performance tests for HQP that represent importance of optimising HistoryItemsForTerms method

components/omnibox/browser/fake_autocomplete_provider_client.h

+// 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 <memory>
+
+#include "base/files/scoped_temp_dir.h"
+#include "base/test/sequenced_worker_pool_owner.h"
+#include "components/omnibox/browser/mock_autocomplete_provider_client.h"
+#include "components/omnibox/browser/test_scheme_classifier.h"
+
+namespace bookmarks {
+class BookmarkModel;
+}  // namespace bookmarks
+
+namespace history {
+class HistoryService;
+}  // namespace history
+
+class InMemoryURLIndex;
+
+// Fully operational AutocompleteProviderClient for usage in tests.
+class FakeAutocompleteProviderClient : public MockAutocompleteProviderClient {
+ public:
+  FakeAutocompleteProviderClient();
+  ~FakeAutocompleteProviderClient() override;
+
+  const AutocompleteSchemeClassifier& GetSchemeClassifier() const override;
+  const SearchTermsData& GetSearchTermsData() const override;
+  history::HistoryService* GetHistoryService() override;
+  bookmarks::BookmarkModel* GetBookmarkModel() override;
+  InMemoryURLIndex* GetInMemoryURLIndex() override;
+
+  void set_in_memory_url_index(std::unique_ptr<InMemoryURLIndex> index) {
+    in_memory_url_index_ = std::move(index);
+  }
+
+ private:
+  base::SequencedWorkerPoolOwner pool_owner_;
+  base::ScopedTempDir history_dir_;
+  std::unique_ptr<bookmarks::BookmarkModel> bookmark_model_;
+  TestSchemeClassifier scheme_classifier_;
+  SearchTermsData search_terms_data_;
+  std::unique_ptr<InMemoryURLIndex> in_memory_url_index_;
+  std::unique_ptr<history::HistoryService> history_service_;
+
+  DISALLOW_COPY_AND_ASSIGN(FakeAutocompleteProviderClient);
+};