Remove redundant code from Android context menu native.

base/android/java/src/org/chromium/base/Callback.java

Index: base/android/java/src/org/chromium/base/Callback.java
diff --git a/base/android/java/src/org/chromium/base/Callback.java b/base/android/java/src/org/chromium/base/Callback.java
index ee5857d639e726b68afcac5b41fd519d067ea7b1..0810b62ccbb6dda37ff1ea7c99c6a6db137a5df1 100644
--- a/base/android/java/src/org/chromium/base/Callback.java
+++ b/base/android/java/src/org/chromium/base/Callback.java
@@ -34,4 +34,10 @@ public abstract class Callback<T> {
     private void onResultFromNative(int result) {
         onResult((T) Integer.valueOf(result));
     }
+
+    @SuppressWarnings("unchecked")
+    @CalledByNative
+    private void onResultFromNative(byte[] result) {
+        onResult((T) result);
+    }
 }