Add the Play Store app search to the launcher.

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

Index: chrome/browser/ui/app_list/search/search_controller_factory.cc
diff --git a/chrome/browser/ui/app_list/search/search_controller_factory.cc b/chrome/browser/ui/app_list/search/search_controller_factory.cc
index 6220d78b5ba0e8ee7829352205d30605768620a0..338cab139bee459ff9609b09adf1f4606ad4604d 100644
--- a/chrome/browser/ui/app_list/search/search_controller_factory.cc
+++ b/chrome/browser/ui/app_list/search/search_controller_factory.cc
@@ -18,6 +18,7 @@
 #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"
@@ -34,6 +35,7 @@ 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;
@@ -109,6 +111,12 @@ std::unique_ptr<SearchController> CreateSearchController(
     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;
 }