Check null intent when launching DownloadNotificationService

chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java

Index: chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java
index 029fcd2ab983ba238380237907065347044af574..ac6829bce5b4910b990c03bc04dcb5de6889370e 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java
@@ -387,6 +387,7 @@ public class DownloadNotificationService extends Service {
      * @return true if the intent requires actions, or false otherwise.
      */
     static boolean isDownloadOperationIntent(Intent intent) {
+        if (intent == null) return false;
         if (!ACTION_DOWNLOAD_CANCEL.equals(intent.getAction())
                 && !ACTION_DOWNLOAD_RESUME.equals(intent.getAction())
                 && !ACTION_DOWNLOAD_PAUSE.equals(intent.getAction())) {