Fix DownloadNotificationService crash caused by early getLastUsedProfile() call

chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadNotificationServiceTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadNotificationServiceTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadNotificationServiceTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadNotificationServiceTest.java
index bd1b00b10e55eeb3c7ca96ec77d6570336fdbbc0..02b45c98ca970ad10f7c40c28f1b582f8c1f37f0 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadNotificationServiceTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadNotificationServiceTest.java
@@ -96,6 +96,16 @@ public class DownloadNotificationServiceTest extends
     }
 
     @Override
+    protected void shutdownService() {
+        ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+            @Override
+            public void run() {
+                DownloadNotificationServiceTest.super.shutdownService();
+            }
+        });
+    }
+
+    @Override
     protected void tearDown() throws Exception {
         SharedPreferences sharedPrefs = ContextUtils.getAppSharedPreferences();
         SharedPreferences.Editor editor = sharedPrefs.edit();
@@ -402,7 +412,14 @@ public class DownloadNotificationServiceTest extends
                 DownloadSharedPreferenceHelper.KEY_PENDING_DOWNLOAD_NOTIFICATIONS, notifications);
         editor.apply();
         startNotificationService();
-        getService().onTaskRemoved(new Intent());
+
+        ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+            @Override
+            public void run() {
+                getService().onTaskRemoved(new Intent());
+            }
+        });
+
         assertTrue(getService().isPaused());
         assertFalse(sharedPrefs.contains(
                 DownloadSharedPreferenceHelper.KEY_PENDING_DOWNLOAD_NOTIFICATIONS));