Auto convert base javatests in content shell apk to JUnit4

base/BUILD.gn

 # Copyright (c) 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.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 2520 matching lines @@
       "*/NativeLibraries##*.class",
     ]
   }
 
   android_library("base_javatests") {
     testonly = true
     deps = [
       ":base_java",
       ":base_java_test_support",
       "//third_party/android_support_test_runner:runner_java",
+      "//third_party/junit:junit",
     ]
     java_files = [
       "android/javatests/src/org/chromium/base/AdvancedMockContextTest.java",
       "android/javatests/src/org/chromium/base/ApiCompatibilityUtilsTest.java",
       "android/javatests/src/org/chromium/base/CommandLineInitUtilTest.java",
       "android/javatests/src/org/chromium/base/CommandLineTest.java",
 
       # TODO(nona): move to Junit once that is built for Android N.
       "android/javatests/src/org/chromium/base/LocaleUtilsTest.java",
       "android/javatests/src/org/chromium/base/ObserverListTest.java",
@@ skipping 112 matching lines @@
 }
 
 fuzzer_test("base_json_correctness_fuzzer") {
   sources = [
     "json/correctness_fuzzer.cc",
   ]
   deps = [
     ":base",
   ]
 }