Add two instrumentation tests for Web Notifications on Android.

chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationManagerProxy.java

Index: chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationManagerProxy.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationManagerProxy.java b/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationManagerProxy.java
index 60d8f135ee5418552588ac337c4e75a5db61d821..1e1c1f7c88f5e886036380a2daa17217b5c23e3d 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationManagerProxy.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationManagerProxy.java
@@ -13,6 +13,9 @@ import android.app.Notification;
  * @see http://developer.android.com/reference/android/app/NotificationManager.html
  */
 public interface NotificationManagerProxy {
-    void cancel(int id);
-    void notify(int id, Notification notification);
+    public void cancel(int id);

[Michael van Ouwerkerk, 2015/02/26 17:24:23]

nit: Java interface methods are public by default, you can omit it here and
below

[Peter Beverloo, 2015/02/26 18:22:38]

Yup, but I like them because they make this explicit. Default visibility is
different per programming language.

+    public void cancel(String tag, int id);
+    public void cancelAll();
+    public void notify(int id, Notification notification);
+    public void notify(String tag, int id, Notification notification);
 }