[Android] Refactor the native test wrappers. (RELAND)

testing/android/native_test/BUILD.gn

 # Copyright 2014 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")
 
-# GYP: //testing/android/native_test.gyp:native_test_native_code
-source_set("native_test_native_code") {
+# GYP: //testing/android/native_test.gyp:native_test_support
+source_set("native_test_support") {
   testonly = true
   sources = [
-    "native_test_jni_onload.cc",
     "native_test_launcher.cc",
     "native_test_launcher.h",
+    "native_test_util.cc",
+    "native_test_util.h",
   ]
-  libs = [ "log" ]
   deps = [
     ":native_test_jni_headers",
-    ":native_test_util",
     "//base",
     "//base/test:test_support",
     "//base/third_party/dynamic_annotations",
     "//testing/gtest",
   ]
 }
 
+# GYP: //testing/android/native_test.gyp:native_test_native_code
+source_set("native_test_native_code") {
+  testonly = true
+  sources = [
+    "native_test_jni_onload.cc",
+  ]
+  libs = [ "log" ]
+  deps = [
+    ":native_test_support",
+    "//base",
+  ]
+}
+
 # GYP: //testing/android/native_test.gyp:native_test_jni_headers
 generate_jni("native_test_jni_headers") {
   sources = [
     "java/src/org/chromium/native_test/NativeTestActivity.java",
   ]
   jni_package = "testing"
 }
-
-# GYP: //testing/android/native_test.gyp:native_test_util
-source_set("native_test_util") {
-  sources = [
-    "native_test_util.cc",
-    "native_test_util.h",
-  ]
-  deps = [
-    "//base",
-  ]
-}