[GN] Set testonly unconditionally.

build/secondary/testing/gtest/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.
 
 config("gtest_config") {
   visibility = [
     ":*",
     "//testing/gmock:*",  # gmock also shares this config.
   ]
 
@@ skipping 50 matching lines @@
 config("gtest_warnings") {
   if (is_win && is_clang) {
     # The Mutex constructor initializer list in gtest-port.cc is incorrectly
     # ordered. See
     # https://groups.google.com/d/msg/googletestframework/S5uSV8L2TX8/U1FaTDa6J6sJ.
     cflags = [ "-Wno-reorder" ]
   }
 }
 
 static_library("gtest") {
-  # TODO http://crbug.com/412064 enable this flag all the time.
-  testonly = !is_component_build
+  testonly = true
   sources = [
     "include/gtest/gtest-death-test.h",
     "include/gtest/gtest-message.h",
     "include/gtest/gtest-param-test.h",
     "include/gtest/gtest-printers.h",
     "include/gtest/gtest-spi.h",
     "include/gtest/gtest-test-part.h",
     "include/gtest/gtest-typed-test.h",
     "include/gtest/gtest.h",
     "include/gtest/gtest_pred_impl.h",
@@ skipping 49 matching lines @@
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     "//build/config/compiler:no_chromium_code",
 
     # Must be after no_chromium_code for warning flags to be ordered correctly.
     ":gtest_warnings",
   ]
 }
 
 source_set("gtest_main") {
-  # TODO http://crbug.com/412064 enable this flag all the time.
-  testonly = !is_component_build
+  testonly = true
   sources = [
     "src/gtest_main.cc",
   ]
   deps = [
     ":gtest",
   ]
 }