[Checkstyle] Fix misc style issues in Java files.

base/test/android/java/src/org/chromium/base/ContentUriTestUtils.java

 // Copyright 2013 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.base;
 
-import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.content.Context;
 import android.database.Cursor;
 import android.net.Uri;
 import android.provider.MediaStore;
 
-import org.chromium.base.CalledByNative;
-
 /**
  * Utilities for testing operations on content URI.
  */
 public class ContentUriTestUtils {
     /**
      * Insert an image into the MediaStore, and return the content URI. If the
      * image already exists in the MediaStore, just retrieve the URI.
      *
      * @param context Application context.
      * @param path Path to the image file.
@@ skipping 16 matching lines @@
         }
 
         // Insert the content URI into MediaStore.
         ContentValues values = new ContentValues();
         values.put(MediaStore.MediaColumns.DATA, path);
         Uri uri = context.getContentResolver().insert(
                 MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
         return uri.toString();
     }
 }