Prevent crashing when collecting some UMA about possible crashing

net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java

Index: net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
diff --git a/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java b/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
index 8eb60878df3120ba8faea12f1f1c09f95963dc85..e164c739c8e1512646572bf668a3003c77ae7ee2 100644
--- a/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
+++ b/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
@@ -104,7 +104,7 @@ public class NetworkChangeNotifierAutoDetect extends BroadcastReceiver {
                     return networkInfo;
                 } catch (NullPointerException secondException) {
                     RecordHistogram.recordBooleanHistogram("NCN.getNetInfo2ndSuccess", false);
-                    throw secondException;
+                    return null;
                 }
             }
         }
@@ -282,7 +282,7 @@ public class NetworkChangeNotifierAutoDetect extends BroadcastReceiver {
                     return wifiInfo;
                 } catch (NullPointerException secondException) {
                     RecordHistogram.recordBooleanHistogram("NCN.getWifiInfo2ndSuccess", false);
-                    throw secondException;
+                    return null;
                 }
             }
         }