GN proto_libary refactoring.

components/tracing/test/proto_zero_generation_unittest.cc

 // Copyright 2016 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.
 
+#include "components/tracing/test/example_proto/library.pbzero.h"
 #include "components/tracing/test/example_proto/test_messages.pbzero.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace tracing {
 namespace proto {
 
 using foo::bar::CamelCaseFields;
 
 TEST(ProtoZeroTest, Simple) {
   // TODO(kraynov) Put tests in the next CL (crbug.com/608721).
+
+  // Test the includes for indirect public import: library.pbzero.h ->
+  // library_internals/galaxies.pbzero.h -> upper_import.pbzero.h .
+  EXPECT_LE(0u, sizeof(foo::bar::TrickyPublicImport));
 }
 
 TEST(ProtoZeroTest, FieldNumbers) {
   // Tests camel case conversion as well.
   EXPECT_EQ(1, CamelCaseFields::kFooBarBazFieldNumber);
   EXPECT_EQ(2, CamelCaseFields::kBarBazFieldNumber);
   EXPECT_EQ(3, CamelCaseFields::kMooMooFieldNumber);
   EXPECT_EQ(4, CamelCaseFields::kURLEncoderFieldNumber);
   EXPECT_EQ(5, CamelCaseFields::kXMapFieldNumber);
   EXPECT_EQ(6, CamelCaseFields::kUrLENcoDerFieldNumber);
   EXPECT_EQ(7, CamelCaseFields::kBigBangFieldNumber);
   EXPECT_EQ(8, CamelCaseFields::kU2FieldNumber);
   EXPECT_EQ(9, CamelCaseFields::kBangBigFieldNumber);
 }
 
 }  // namespace proto
 }  // namespace tracing