diff --git a/java/src/com/android/inputmethod/compat/ArraysCompatUtils.java b/java/src/com/android/inputmethod/compat/ArraysCompatUtils.java
deleted file mode 100644
index 011473b..0000000
--- a/java/src/com/android/inputmethod/compat/ArraysCompatUtils.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.inputmethod.compat;
-
-import android.util.Log;
-
-import java.lang.reflect.Method;
-import java.util.Arrays;
-
-public class ArraysCompatUtils {
-    private static final String TAG = ArraysCompatUtils.class.getSimpleName();
-
-    private static final Method METHOD_Arrays_binarySearch = CompatUtils
-            .getMethod(Arrays.class, "binarySearch", int[].class, int.class, int.class, int.class);
-
-    public static int binarySearch(int[] array, int startIndex, int endIndex, int value) {
-        if (METHOD_Arrays_binarySearch != null) {
-            final Object index = CompatUtils.invoke(null, 0, METHOD_Arrays_binarySearch,
-                    array, startIndex, endIndex, value);
-            return (Integer)index;
-        } else {
-            return compatBinarySearch(array, startIndex, endIndex, value);
-        }
-    }
-
-    // TODO: Implement fast binary search
-    /* package for testing */
-    static int compatBinarySearch(int[] array, int startIndex, int endIndex, int value) {
-        // Output error log because this method has strict performance penalty.
-        // Note that this method has been called only from spell checker and spell checker exists
-        // only from IceCreamSandwich and after, so that there is no chance on pre-ICS device to
-        // invoke this method.
-        Log.e(TAG, "Invoked expensive binarySearch");
-
-        if (startIndex > endIndex) throw new IllegalArgumentException();
-        if (startIndex < 0 || endIndex > array.length) throw new ArrayIndexOutOfBoundsException();
-
-        final int work[] = new int[endIndex - startIndex];
-        System.arraycopy(array, startIndex, work, 0, work.length);
-        final int index = Arrays.binarySearch(work, value);
-        if (index >= 0) {
-            return index + startIndex;
-        } else {
-            return ~(~index + startIndex);
-        }
-    }
-}
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerService.java b/java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerService.java
index 5a17385..7b13e40 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerService.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerService.java
@@ -26,7 +26,6 @@
 import android.view.textservice.SuggestionsInfo;
 import android.view.textservice.TextInfo;
 
-import com.android.inputmethod.compat.ArraysCompatUtils;
 import com.android.inputmethod.compat.SuggestionsInfoCompatUtils;
 import com.android.inputmethod.keyboard.ProximityInfo;
 import com.android.inputmethod.latin.BinaryDictionary;
@@ -237,7 +236,7 @@
         @Override
         synchronized public boolean addWord(char[] word, int wordOffset, int wordLength, int score,
                 int dicTypeId, int dataType) {
-            final int positionIndex = ArraysCompatUtils.binarySearch(mScores, 0, mLength, score);
+            final int positionIndex = Arrays.binarySearch(mScores, 0, mLength, score);
             // binarySearch returns the index if the element exists, and -<insertion index> - 1
             // if it doesn't. See documentation for binarySearch.
             final int insertIndex = positionIndex >= 0 ? positionIndex : -positionIndex - 1;