Create AwJUnit4ClassRunner AwActivityTestRule and convert AwContentsTest

android_webview/test/BUILD.gn

Index: android_webview/test/BUILD.gn
diff --git a/android_webview/test/BUILD.gn b/android_webview/test/BUILD.gn
index c3ebb7928faba8154b9398d1b933e8eefc5db922..8c3b2e3e366e4635890943960fffe2befe17b25d 100644
--- a/android_webview/test/BUILD.gn
+++ b/android_webview/test/BUILD.gn
@@ -26,6 +26,8 @@ android_apk("webview_instrumentation_apk") {
     "//base:base_java_test_support",
     "//components/policy/android:policy_java_test_support",
     "//content/public/android:content_java",
+    "//third_party/android_support_test_runner:runner_java",
+    "//third_party/junit",
     "//ui/android:ui_java",
   ]
 
@@ -40,6 +42,7 @@ android_apk("webview_instrumentation_apk") {
     "shell/src/org/chromium/android_webview/test/AwInstrumentationTestRunner.java",
     "shell/src/org/chromium/android_webview/test/AwTestContainerView.java",
     "shell/src/org/chromium/android_webview/test/AwTestRunnerActivity.java",
+    "shell/src/org/chromium/android_webview/test/AwJUnit4ClassRunner.java",
     "shell/src/org/chromium/android_webview/test/NullContentsClient.java",
     "shell/src/org/chromium/android_webview/test/SecondBrowserProcess.java",
     "shell/src/org/chromium/android_webview/test/TestContentProvider.java",
@@ -126,7 +129,9 @@ instrumentation_test_apk("webview_instrumentation_test_apk") {
     "//device/geolocation:geolocation_java_test_support",
     "//net/android:net_java",
     "//net/android:net_java_test_support",
+    "//third_party/android_support_test_runner:rules_java",
     "//third_party/android_support_test_runner:runner_java",
+    "//third_party/junit",
     "//ui/android:ui_java",
   ]
   java_files = [
@@ -166,7 +171,9 @@ instrumentation_test_apk("webview_instrumentation_test_apk") {
     "../javatests/src/org/chromium/android_webview/test/AwServiceWorkerClientTest.java",
     "../javatests/src/org/chromium/android_webview/test/AwSettingsTest.java",
     "../javatests/src/org/chromium/android_webview/test/AwStrictModeTest.java",
+    "../javatests/src/org/chromium/android_webview/test/AwTestCommon.java",
     "../javatests/src/org/chromium/android_webview/test/AwTestBase.java",
+    "../javatests/src/org/chromium/android_webview/test/AwActivityTestRule.java",
     "../javatests/src/org/chromium/android_webview/test/AwWebContentsObserverTest.java",
     "../javatests/src/org/chromium/android_webview/test/AwVariationsSeedFetchServiceTest.java",
     "../javatests/src/org/chromium/android_webview/test/AwZoomTest.java",