[GN] Set testonly unconditionally.

base/test/BUILD.gn

Index: base/test/BUILD.gn
diff --git a/base/test/BUILD.gn b/base/test/BUILD.gn
index 463f343707f14f65d3159f43261b0b51049affa1..181a23fe85acaf5f8a49ba79c8944ccc16603fe2 100644
--- a/base/test/BUILD.gn
+++ b/base/test/BUILD.gn
@@ -10,8 +10,7 @@ if (is_android) {
 }
 
 source_set("test_config") {
-  # TODO http://crbug.com/412064 enable this flag all the time.
-  testonly = !is_component_build
+  testonly = true
   sources = [
     "test_switches.cc",
     "test_switches.h",
@@ -25,8 +24,7 @@ source_set("test_config") {
 
 # GYP: //base/base.gyp:test_support_base
 source_set("test_support") {
-  # TODO http://crbug.com/412064 enable this flag all the time.
-  testonly = !is_component_build
+  testonly = true
   sources = [
     "gtest_util.cc",
     "gtest_util.h",