🚀 Geneate base_unittest's Android .isolate file at build-time

testing/test.gni

Index: testing/test.gni
diff --git a/testing/test.gni b/testing/test.gni
index 4503860eedcb07b4c186e92ae239045e33ab41bb..897926b605d7c6b52e8db0463c3a012b9f9e0ee8 100644
--- a/testing/test.gni
+++ b/testing/test.gni
@@ -6,6 +6,23 @@
 # TEST SETUP
 # ==============================================================================
 
+if (is_android) {
+  template("_gen_apk_isolate") {
+    action(target_name) {
+      script = "//build/android/gyp/gen-android-test-isolate.py"
+      outputs = [
+        invoker.output,
+      ]
+      args = [
+        "--out-file",
+        rebase_path(invoker.output, root_build_dir),
+        ".",
+        invoker.lib_target,
+      ]
+    }
+  }
+}
+
 # Define a test as an executable (or apk on Android) with the "testonly" flag
 # set.
 template("test") {
@@ -17,6 +34,19 @@ template("test") {
     library_name = "_${target_name}__library"
     apk_name = "${target_name}_apk"
 
+    # TODO(agrieve): Delete invoker.isolate_file when write_runtime_deps() is
+    # available. http://crbug.com/593416
+    _requires_apk_isolate =
+        defined(invoker.isolate_file) && invoker.isolate_file != ""
+
+    if (_requires_apk_isolate) {
+      _apk_isolate_target_name = "_${target_name}__apk_isolate"
+      _apk_isolate_path = "$target_gen_dir/$target_name.apk.isolate"
+      _gen_apk_isolate(_apk_isolate_target_name) {
+        lib_target = get_label_info(":$library_name", "label_no_toolchain")
+        output = _apk_isolate_path
+      }
+    }
     shared_library(library_name) {
       # Configs will always be defined since we set_defaults for a component
       # in the main config. We want to use those rather than whatever came with
@@ -89,8 +119,8 @@ template("test") {
       test_name = _test_name
       test_type = "gtest"
       test_suite = _test_name
-      if (defined(invoker.isolate_file)) {
-        isolate_file = invoker.isolate_file
+      if (_requires_apk_isolate) {
+        isolate_file = _apk_isolate_path
       }
     }
     incremental_test_runner_script_name =
@@ -101,25 +131,31 @@ template("test") {
       test_type = "gtest"
       test_suite = _test_name
       incremental_install = true
-      if (defined(invoker.isolate_file)) {
-        isolate_file = invoker.isolate_file
+      if (_requires_apk_isolate) {
+        isolate_file = _apk_isolate_path
       }
     }
 
     group(target_name) {
       testonly = true
-      datadeps = [
+      data_deps = [
         ":$test_runner_script_name",
       ]
+      if (_requires_apk_isolate) {
+        data_deps += [ ":$_apk_isolate_target_name" ]
+      }
       deps = [
         ":$apk_name",
       ]
     }
     group("${target_name}_incremental") {
       testonly = true
-      datadeps = [
+      data_deps = [
         ":$incremental_test_runner_script_name",
       ]
+      if (_requires_apk_isolate) {
+        data_deps += [ ":$_apk_isolate_target_name" ]
+      }
       deps = [
         ":${apk_name}_incremental",
       ]