Add null-check in OmahaClient for handling intent.

chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaClient.java

Index: chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaClient.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaClient.java b/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaClient.java
index 20f1de70b7d0507f76cc223b4e50161523971e7e..5b858aac30b67d58f55650a3a2cef75770871061 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaClient.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaClient.java
@@ -198,6 +198,10 @@ public class OmahaClient extends IntentService {
             return;
         }
 
+        if (getRequestGenerator() == null) {
+            return;
+        }
+
         if (!mStateHasBeenRestored) {
             restoreState();
         }