Adding WebView select tests to test select element's dropdown menu

android_webview/tools/automated_ui_tests/BUILD.gn

Index: android_webview/tools/automated_ui_tests/BUILD.gn
diff --git a/android_webview/tools/automated_ui_tests/BUILD.gn b/android_webview/tools/automated_ui_tests/BUILD.gn
index a7dac4284d953f0180b8cde7362f2280f5a4ee83..942136ffe59abe1c2ec2788e24695c9572a82931 100644
--- a/android_webview/tools/automated_ui_tests/BUILD.gn
+++ b/android_webview/tools/automated_ui_tests/BUILD.gn
@@ -42,7 +42,10 @@ instrumentation_test_apk("webview_ui_test_app_test_apk") {
   android_manifest = "javatests/AndroidManifest.xml"
   java_files = [
     "javatests/src/org/chromium/webview_ui_test/test/ActionModeTest.java",
+    "javatests/src/org/chromium/webview_ui_test/test/DropDownListTest.java",
     "javatests/src/org/chromium/webview_ui_test/test/WebViewJSTest.java",
+    "javatests/src/org/chromium/webview_ui_test/test/util/Actions.java",
+    "javatests/src/org/chromium/webview_ui_test/test/util/Atoms.java",
     "javatests/src/org/chromium/webview_ui_test/test/util/UseLayout.java",
     "javatests/src/org/chromium/webview_ui_test/test/util/WebViewUiTestRule.java",
     "javatests/src/org/chromium/webview_ui_test/test/util/WebViewSyncWrapper.java",
@@ -54,6 +57,7 @@ instrumentation_test_apk("webview_ui_test_app_test_apk") {
     "//base:base_java_test_support",
     "//third_party/android_support_test_runner:rules_java",
     "//third_party/android_support_test_runner:runner_java",
+    "//third_party/android_tools:android_support_annotations_java",
     "//third_party/espresso:espresso_all_java",
     "//third_party/hamcrest:hamcrest_java",
     "//third_party/junit",