Add the Play Store app search to the launcher.

chrome/browser/ui/app_list/search/search_controller_factory.cc

 // Copyright 2014 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/ui/app_list/search/search_controller_factory.h"
 
 #include <stddef.h>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_util.h"
 #include "base/time/default_clock.h"
 #include "build/build_config.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/search/answer_card_search_provider.h"
 #include "chrome/browser/ui/app_list/search/app_search_provider.h"
 #include "chrome/browser/ui/app_list/search/history_factory.h"
 #include "chrome/browser/ui/app_list/search/launcher_search/launcher_search_provider.h"
 #include "chrome/browser/ui/app_list/search/omnibox_provider.h"
+#include "chrome/browser/ui/app_list/search/playstore/playstore_search_provider.h"
 #include "chrome/browser/ui/app_list/search/suggestions/suggestions_search_provider.h"
 #include "chrome/browser/ui/app_list/search/webstore/webstore_provider.h"
 #include "chrome/common/chrome_switches.h"
 #include "ui/app_list/app_list_features.h"
 #include "ui/app_list/app_list_model.h"
 #include "ui/app_list/app_list_switches.h"
 #include "ui/app_list/search/mixer.h"
 #include "ui/app_list/search_controller.h"
 
 namespace app_list {
 
 namespace {
 
 // Maximum number of results to show in each mixer group.
 constexpr size_t kMaxAppsGroupResults = 8;
 constexpr size_t kMaxOmniboxResults = 4;
+constexpr size_t kMaxPlaystoreResults = 2;

[Luis Héctor Chávez, 2017/06/16 22:24:35]

nit: kMaxPlayStoreResults

[Jiaquan He, 2017/06/22 04:30:04]

Done.

 constexpr size_t kMaxWebstoreResults = 2;
 constexpr size_t kMaxSuggestionsResults = 6;
 constexpr size_t kMaxLauncherSearchResults = 2;
 
 // Constants related to the SuggestionsService in AppList field trial.
 constexpr char kSuggestionsProviderFieldTrialName[] =
     "SuggestionsAppListProvider";
 constexpr char kSuggestionsProviderFieldTrialEnabledPrefix[] = "Enabled";
 
 // Returns whether the user is part of a group where the Suggestions provider is
@@ skipping 55 matching lines @@
 
   // LauncherSearchProvider is added only when flag is enabled, not in guest
   // session and running on Chrome OS.
   if (app_list::switches::IsDriveSearchInChromeLauncherEnabled() &&
       !profile->IsGuestSession()) {
     size_t search_api_group_id =
         controller->AddGroup(kMaxLauncherSearchResults, 1.0);
     controller->AddProvider(search_api_group_id,
                             base::MakeUnique<LauncherSearchProvider>(profile));
   }
+  // TODO: these params are arbitrary
+  size_t playstore_api_group_id =
+      controller->AddGroup(kMaxPlaystoreResults, 1.0);
+  controller->AddProvider(
+      playstore_api_group_id,
+      base::MakeUnique<PlaystoreSearchProvider>(kMaxPlaystoreResults));
 
   return controller;
 }
 
 }  // namespace app_list