Enable NativeActivity based Android tests.

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_support
 source_set("native_test_support") {
   testonly = true
   sources = [
@@ skipping 17 matching lines @@
   sources = [
     "native_test_jni_onload.cc",
   ]
   libs = [ "log" ]
   deps = [
     ":native_test_support",
     "//base",
   ]
 }
 
+jinja_template("native_test_activity") {
+  input = "java/src/org/chromium/native_test/NativeTestActivity.java.jinja2"
+  output = "${root_gen_dir}/native_test_activity/org/chromium/native_test/NativeTestActivity.java"

[agrieve, 2016/05/19 00:42:50]

Please use $target_gen_dir/$target_name rather than $root_gen_dir (here and
below)

[ynovikov, 2016/05/20 02:38:10]

Done.

+  variables = [ "use_native_activity=false" ]
+}
+
+jinja_template("native_test_native_activity") {
+  input = "java/src/org/chromium/native_test/NativeTestActivity.java.jinja2"
+  output = "${root_gen_dir}/native_test_native_activity/org/chromium/native_test/NativeTestActivity.java"
+  variables = [ "use_native_activity=true" ]
+}
+
 # GYP: //testing/android/native_test.gyp:native_test_java
 android_library("native_test_java") {
   testonly = true
   deps = [
     "//base:base_java",
     "//testing/android/appurify_support:appurify_support_java",
     "//testing/android/reporter:reporter_java",
   ]
+  java_deps = [ ":native_test_activity" ]
   srcjar_deps = [ "//base:base_native_libraries_gen" ]
   java_files = [
     "java/src/org/chromium/native_test/NativeBrowserTestActivity.java",
-    "java/src/org/chromium/native_test/NativeTestActivity.java",
+    "${root_gen_dir}/native_test_activity/org/chromium/native_test/NativeTestActivity.java",
     "java/src/org/chromium/native_test/NativeTestInstrumentationTestRunner.java",
     "java/src/org/chromium/native_test/NativeUnitTestActivity.java",
   ]
+  jar_excluded_patterns = [ "*/NativeLibraries.class" ]
+}
+
+android_library("native_test_native_activity_java") {
+  testonly = true
+  deps = [
+    "//base:base_java",
+    "//testing/android/appurify_support:appurify_support_java",
+    "//testing/android/reporter:reporter_java",
+  ]
+  java_deps = [ ":native_test_native_activity" ]
+  srcjar_deps = [ "//base:base_native_libraries_gen" ]
+  java_files = [
+    "java/src/org/chromium/native_test/NativeBrowserTestActivity.java",
+    "${root_gen_dir}/native_test_native_activity/org/chromium/native_test/NativeTestActivity.java",
+    "java/src/org/chromium/native_test/NativeTestInstrumentationTestRunner.java",
+    "java/src/org/chromium/native_test/NativeUnitTestActivity.java",
+  ]
   jar_excluded_patterns = [ "*/NativeLibraries.class" ]
 }
 
 # GYP: //testing/android/native_test.gyp:native_test_jni_headers
 generate_jni("native_test_jni_headers") {
+  deps = [
+    ":native_test_activity",
+  ]
   sources = [
-    "java/src/org/chromium/native_test/NativeTestActivity.java",
+    "${root_gen_dir}/native_test_activity/org/chromium/native_test/NativeTestActivity.java",
   ]
   jni_package = "testing"
 }