Remove redundant field initialization in Java code.

components/safe_json/android/java/src/org/chromium/components/safejson/JsonSanitizer.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.components.safejson;
 
 import android.util.JsonReader;
 import android.util.JsonToken;
 import android.util.JsonWriter;
 import android.util.MalformedJsonException;
@@ skipping 109 matching lines @@
             nativeOnError(nativePtr, e.getMessage());
             return;
         }
         nativeOnSuccess(nativePtr, result);
     }
 
     /**
      * Helper class to check nesting depth of JSON expressions.
      */
     private static class StackChecker {
-        private int mStackDepth = 0;
+        private int mStackDepth;
 
         public void increaseAndCheck() {
             if (++mStackDepth >= MAX_NESTING_DEPTH) {
                 throw new IllegalStateException("Too much nesting");
             }
         }
 
         public void decrease() {
             mStackDepth--;
         }
@@ skipping 47 matching lines @@
     private static boolean isUnicodeCharacter(int codePoint) {
         // See the native method base::IsValidCharacter().
         return codePoint < 0xD800 || (codePoint >= 0xE000 && codePoint < 0xFDD0)
                 || (codePoint > 0xFDEF && codePoint <= 0x10FFFF && (codePoint & 0xFFFE) != 0xFFFE);
     }
 
     private static native void nativeOnSuccess(long id, String json);
 
     private static native void nativeOnError(long id, String error);
 }