Remove redundant field initialization in Java code.

device/gamepad/android/java/src/org/chromium/device/gamepad/GamepadMappings.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.device.gamepad;
 
 import android.view.KeyEvent;
 import android.view.MotionEvent;
 
 import org.chromium.base.VisibleForTesting;
@@ skipping 251 matching lines @@
             mapXYAxes(mappedAxes, rawAxes);
             mapRXAndRYAxesToRightStick(mappedAxes, rawAxes);
         }
     }
 
     private static class UnknownGamepadMappings extends GamepadMappings {
         private int mLeftTriggerAxis = -1;
         private int mRightTriggerAxis = -1;
         private int mRightStickXAxis = -1;
         private int mRightStickYAxis = -1;
-        private boolean mUseHatAxes = false;
+        private boolean mUseHatAxes;
 
         UnknownGamepadMappings(int[] axes) {
             int hatAxesFound = 0;
 
             for (int axis : axes) {
                 switch (axis) {
                     case MotionEvent.AXIS_LTRIGGER:
                     case MotionEvent.AXIS_BRAKE:
                         mLeftTriggerAxis = axis;
                         break;
@@ skipping 61 matching lines @@
             }
 
             if (mUseHatAxes) {
                 mapHatAxisToDpadButtons(mappedButtons, rawAxes);
             } else {
                 mapCommonDpadButtons(mappedButtons, rawButtons);
             }
         }
     }
 }