Add the Play Store app search to the launcher.

components/arc/test/fake_app_instance.cc

 // Copyright 2015 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/arc/test/fake_app_instance.h"
 
 #include <stdint.h>
 
 #include <string>
 #include <utility>
@@ skipping 249 matching lines @@
     mojom::ShowPackageInfoPage page,
     const gfx::Rect& dimension_on_screen) {}
 
 void FakeAppInstance::SetNotificationsEnabled(const std::string& package_name,
                                               bool enabled) {}
 
 void FakeAppInstance::InstallPackage(mojom::ArcPackageInfoPtr arcPackageInfo) {
   app_host_->OnPackageAdded(std::move(arcPackageInfo));
 }
 
+void FakeAppInstance::GetRecentAndSuggestedAppsFromPlayStore(
+    const std::string& query,
+    int32_t max_results,
+    const GetRecentAndSuggestedAppsFromPlayStoreCallback& callback) {}

[Luis Héctor Chávez, 2017/06/23 15:17:03]

other methods invoke their callbacks to avoid the caller from waiting forever:

callback.Run({});

[Jiaquan He, 2017/06/23 16:26:27]

Done.

+
 void FakeAppInstance::LaunchIntent(
     const std::string& intent_uri,
     const base::Optional<gfx::Rect>& dimension_on_screen) {
   launch_intents_.push_back(intent_uri);
 }
 
 void FakeAppInstance::RequestIcon(const std::string& icon_resource_id,
                                   arc::mojom::ScaleFactor scale_factor,
                                   const RequestIconCallback& callback) {
   shortcut_icon_requests_.push_back(
       base::MakeUnique<ShortcutIconRequest>(icon_resource_id, scale_factor));
 
   std::string png_data_as_string;
   if (GetFakeIcon(scale_factor, &png_data_as_string)) {
     callback.Run(std::vector<uint8_t>(png_data_as_string.begin(),
                                       png_data_as_string.end()));
   }
 }
 
 void FakeAppInstance::RemoveCachedIcon(const std::string& icon_resource_id) {}
 
 }  // namespace arc