Convert WebView Layout test to JUnit4

android_webview/tools/system_webview_shell/BUILD.gn

 # 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.
 
 import("//build/config/android/rules.gni")
 import("//testing/test.gni")
 
 # Mark all targets as test only.
 testonly = true
 
@@ skipping 54 matching lines @@
   android_manifest = "layout_tests/AndroidManifest.xml"
   java_files = [
     "layout_tests/src/org/chromium/webview_shell/test/WebViewLayoutTest.java",
     "layout_tests/src/org/chromium/webview_shell/test/WebViewLayoutTestRunner.java",
     "layout_tests/src/org/chromium/webview_shell/test/WebViewThreadTest.java",
   ]
   deps = [
     "//base:base_java",
     "//base:base_java_test_support",
     "//testing/android/reporter:reporter_java",
+    "//third_party/android_support_test_runner:rules_java",
     "//third_party/android_support_test_runner:runner_java",
+    "//third_party/junit",
   ]
   data = [
     "test/data/",
     "//third_party/WebKit/LayoutTests/webexposed/global-interface-listing.html",
     "//third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt",
     "//third_party/WebKit/LayoutTests/webexposed/resources/global-interface-listing.js",
   ]
 }