getInstalledRelatedApps: Avoid blocking the UI thread doing computation.

content/public/android/junit/src/org/chromium/content/browser/installedapp/InstalledAppProviderTest.java

Index: content/public/android/junit/src/org/chromium/content/browser/installedapp/InstalledAppProviderTest.java
diff --git a/content/public/android/junit/src/org/chromium/content/browser/installedapp/InstalledAppProviderTest.java b/content/public/android/junit/src/org/chromium/content/browser/installedapp/InstalledAppProviderTest.java
index 5c8144731f550c113fe520536be26945265b5acb..26ca0e7aaf2a3c14fea6bdf480f187a0d8e5ad64 100644
--- a/content/public/android/junit/src/org/chromium/content/browser/installedapp/InstalledAppProviderTest.java
+++ b/content/public/android/junit/src/org/chromium/content/browser/installedapp/InstalledAppProviderTest.java
@@ -23,6 +23,7 @@ import org.robolectric.res.builder.DefaultPackageManager;
 import org.chromium.base.test.util.Feature;
 import org.chromium.installedapp.mojom.InstalledAppProvider;
 import org.chromium.installedapp.mojom.RelatedApplication;
+import org.chromium.testing.local.CustomShadowAsyncTask;
 import org.chromium.testing.local.LocalRobolectricTestRunner;
 
 import java.net.URI;
@@ -33,7 +34,7 @@ import java.util.HashMap;
  * Ensure that the InstalledAppProvider returns the correct apps.
  */
 @RunWith(LocalRobolectricTestRunner.class)
-@Config(manifest = Config.NONE)
+@Config(manifest = Config.NONE, shadows = {CustomShadowAsyncTask.class})
 public class InstalledAppProviderTest {
     private static final String ASSET_STATEMENTS_KEY =
             InstalledAppProviderImpl.ASSET_STATEMENTS_KEY;