Revert "[HW7.5] Introduce the @Nonnull annotation"

This reverts commit 60a2cd8ac439bf41bfddc5f5f339feda7c7ff175.

Reverting due to build breakage under the unbundled branch.

Change-Id: Iab2988c53884166f62c95da920ac7a7079a0e5a0

1 files changed, 4 insertions, 3 deletions

diff --git a/java/src/com/android/inputmethod/event/CombinerChain.java b/java/src/com/android/inputmethod/event/CombinerChain.java
index f69bf4fd0..8ddc9e7d9 100644
--- a/java/src/com/android/inputmethod/event/CombinerChain.java
+++ b/java/src/com/android/inputmethod/event/CombinerChain.java
@@ -24,8 +24,6 @@ import com.android.inputmethod.latin.Constants;
 import java.util.ArrayList;
 import java.util.HashMap;
 
-import javax.annotation.Nonnull;
-
 /**
  * This class implements the logic chain between receiving events and generating code points.
  *
@@ -89,7 +87,6 @@ public class CombinerChain {
      * @return the processed event. It may be the same event, or a consumed event, or a completely
      *   new event. However it may never be null.
      */
-    @Nonnull
     public Event processEvent(final ArrayList<Event> previousEvents, final Event newEvent) {
         final ArrayList<Event> modifiablePreviousEvents = new ArrayList<>(previousEvents);
         Event event = newEvent;
@@ -97,6 +94,10 @@ public class CombinerChain {
             // A combiner can never return more than one event; it can return several
             // code points, but they should be encapsulated within one event.
             event = combiner.processEvent(modifiablePreviousEvents, event);
+            if (null == event) {
+                // Combiners return null if they eat the event.
+                break;
+            }
         }
         return event;
     }