Add the Play Store app search to the launcher.

chrome/browser/ui/app_list/search/playstore/playstore_search_provider.cc

+// Copyright 2017 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 "playstore_search_provider.h"
+
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
+#include "chrome/browser/ui/app_list/search/playstore/playstore_search_result.h"
+#include "components/arc/arc_bridge_service.h"
+#include "components/arc/arc_service_manager.h"
+
+namespace app_list {
+
+PlayStoreSearchProvider::PlayStoreSearchProvider(
+    int max_results,
+    Profile* profile,
+    AppListControllerDelegate* list_controller)
+    : max_results_(max_results),
+      profile_(profile),
+      list_controller_(list_controller),
+      weak_ptr_factory_(this) {}
+
+PlayStoreSearchProvider::~PlayStoreSearchProvider() {}

[Luis Héctor Chávez, 2017/06/22 15:42:09]

nit: = default

[Jiaquan He, 2017/06/22 19:12:40]

Done.

+
+void PlayStoreSearchProvider::Start(bool is_voice_query,
+                                    const base::string16& query) {
+  // TODO: should search for voice?

[Luis Héctor Chávez, 2017/06/22 15:42:09]

please file a (Chromium) bug for this.

[Jiaquan He, 2017/06/22 19:12:41]

Done.

+  arc::mojom::AppInstance* app_instance =
+      arc::ArcServiceManager::Get()
+          ? ARC_GET_INSTANCE_FOR_METHOD(
+                arc::ArcServiceManager::Get()->arc_bridge_service()->app(),
+                GetRecentAndSuggestedAppsFromPlayStore)
+          : nullptr;
+
+  if (app_instance == nullptr)
+    return;
+
+  ClearResults();
+  app_instance->GetRecentAndSuggestedAppsFromPlayStore(
+      UTF16ToUTF8(query), max_results_,
+      base::Bind(&PlayStoreSearchProvider::OnResults,
+                 weak_ptr_factory_.GetWeakPtr()));
+}
+
+void PlayStoreSearchProvider::Stop() {}
+
+void PlayStoreSearchProvider::OnResults(
+    std::vector<PlayStoreSearchResultUniquePtr> results) {
+  for (unsigned long i = 0; i < results.size(); i++) {

[Luis Héctor Chávez, 2017/06/22 15:42:09]

for (const auto& result : results)

(you should also be using size_t instead of unsigned long to match
std::vector::size()'s return type).

[Jiaquan He, 2017/06/22 19:12:41]

Done.

+    results[i]->set_profile(profile_);
+    results[i]->set_list_controller(list_controller_);
+    Add(std::move(results[i]));
+  }
+}
+
+}  // namespace app_list