Use ChromeLauncherController's ActivateApp to activate apps.

Similar with AppServiceAppResult, AppServiceAppItem should use
ChromeLauncherController's ActivateApp to activate apps, the same as
ExtensionAppItem:
https://cs.chromium.org/chromium/src/chrome/browser/ui/app_list/extension_app_item.cc?q=ActivateApp&l=155&dr=C

BUG=1026730

Change-Id: I28fd19df903422092052c1a33cb42682bbcf6560
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1933856Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Nancy Wang <nancylingwang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#718890}

chrome/browser/ui/app_list/app_service/app_service_app_item.cc

@@ -104,9 +104,28 @@ void AppServiceAppItem::OnAppUpdate(const apps::AppUpdate& app_update,
 }
 
 void AppServiceAppItem::Activate(int event_flags) {
+  // For Chrome apps or Web apps, if it is non-platform app, it could be
+  // selecting an existing delegate for the app, so call
+  // ChromeLauncherController's ActivateApp interface. Platform apps or ARC
+  // apps, Crostini apps treat activations as a launch. The app can decide
+  // whether to show a new window or focus an existing window as it sees fit.
+  //
   // TODO(crbug.com/1022541): Move the Chrome special case to ExtensionApps,
   // when AppService Instance feature is done.
-  if (id() == extension_misc::kChromeAppId) {
+  apps::AppServiceProxy* proxy =
+      apps::AppServiceProxyFactory::GetForProfile(profile());
+  if (!proxy)
+    return;
+  bool is_active_app = false;
+  proxy->AppRegistryCache().ForOneApp(
+      id(), [&is_active_app](const apps::AppUpdate& update) {
+        if ((update.AppType() == apps::mojom::AppType::kExtension ||
+             update.AppType() == apps::mojom::AppType::kWeb) &&
+            update.IsPlatformApp() == apps::mojom::OptionalBool::kFalse) {
+          is_active_app = true;
+        }
+      });
+  if (is_active_app) {
     ChromeLauncherController::instance()->ActivateApp(
         id(), ash::LAUNCH_FROM_APP_LIST, event_flags,
         GetController()->GetAppListDisplayId());