[WebAPKs]: Run WebApkInstaller::OnInstallFinished() for Google Play updates

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java
index c19b3a1ea8020608620cea38c7e3c4cf9f2dacfc..894ed3983d37215b81754834b52902fe17670762 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java
@@ -162,10 +162,19 @@ public class WebApkInstaller {
     @CalledByNative
     private void updateAsyncFromGooglePlay(
             String packageName, int version, String title, String token, String url) {
-        if (mGooglePlayWebApkInstallDelegate == null) return;
+        if (mGooglePlayWebApkInstallDelegate == null) {
+            notify(false);
+            return;
+        }
 
+        Callback<Boolean> callback = new Callback<Boolean>() {
+            @Override
+            public void onResult(Boolean success) {
+                WebApkInstaller.this.notify(success);
+            }
+        };
         mGooglePlayWebApkInstallDelegate.installAsync(
-                packageName, version, title, token, url, null);
+                packageName, version, title, token, url, callback);
     }
 
     /**