Create ContentShellActivityTestRule and BaseJUnitRunner

content/public/test/android/BUILD.gn

Index: content/public/test/android/BUILD.gn
diff --git a/content/public/test/android/BUILD.gn b/content/public/test/android/BUILD.gn
index 91d05b2b44088b610762160ceca391d2728a5ed2..9a20eb2615e6c576a0b77dd42216d40fe5ec2691 100644
--- a/content/public/test/android/BUILD.gn
+++ b/content/public/test/android/BUILD.gn
@@ -24,10 +24,14 @@ android_library("content_java_test_support") {
     "//base:base_java_test_support",
     "//content/public/android:content_java",
     "//device/geolocation:geolocation_java_test_support",
+    "//third_party/android_support_test_runner:rules_java",
+    "//third_party/android_support_test_runner:runner_java",
+    "//third_party/junit:junit",
     "//ui/android:ui_java",
   ]
   java_files = [
     "javatests/src/org/chromium/content/browser/test/NativeLibraryTestBase.java",
+    "javatests/src/org/chromium/content/browser/test/NativeLibraryTestRule.java",
     "javatests/src/org/chromium/content/browser/test/util/ApplicationUtils.java",
     "javatests/src/org/chromium/content/browser/test/util/ClickUtils.java",
     "javatests/src/org/chromium/content/browser/test/util/Criteria.java",