arc: Prevent App list popping on each app installed from batch.

components/arc/common/app.mojom

Index: components/arc/common/app.mojom
diff --git a/components/arc/common/app.mojom b/components/arc/common/app.mojom
index 2cad0d419ed0dd4e34a3763d1d17f2819ba98103..6aedc0dacf180e35f341ff4ccd4b2f7f9fbb5004 100644
--- a/components/arc/common/app.mojom
+++ b/components/arc/common/app.mojom
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Next MinVersion: 16
+// Next MinVersion: 17
 
 module arc.mojom;
 
@@ -69,7 +69,7 @@ enum ShowPackageInfoPage {
   MANAGE_LINKS = 1,
 };
 
-// Next method ID: 14
+// Next method ID: 16
 interface AppHost {
   // Sends newly added ARC app to Chrome. This message is sent when ARC receives
   // package added notification. Multiple apps may be added in the one package.
@@ -129,6 +129,12 @@ interface AppHost {
   // Notifies that an application shortcut needs to be created.
   [MinVersion=9] OnInstallShortcut@11(ShortcutInfo shortcut);
 
+  // Notifies that Play Store installation has been started.
+  [MinVersion=16] OnInstallationStarted@14();
+
+  // Notifies that Play Store installation is finished.
+  [MinVersion=16] OnInstallationFinished@15();
+
   // Notifies that task requested orientation lock.
   [MinVersion=12] OnTaskOrientationLockRequested@12(int32 task_id,
                                                     OrientationLock lock);