Cleanup references to concurrent_links in gn binary.

tools/gn/ninja_build_writer_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 <sstream>
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/ninja_build_writer.h"
 #include "tools/gn/pool.h"
 #include "tools/gn/scheduler.h"
@@ skipping 48 matching lines @@
 
   NinjaBuildWriter writer(setup.build_settings(), used_toolchains,
                           setup.toolchain(), targets, ninja_out, depfile_out);
   ASSERT_TRUE(writer.Run(&err));
 
   const char expected_rule_gn[] = "rule gn\n";
   const char expected_build_ninja[] =
       "build build.ninja: gn\n"
       "  generator = 1\n"
       "  depfile = build.ninja.d\n";
-  const char expected_link_pool[] =
-      "pool link_pool\n"
-      "  depth = 0\n";
   const char expected_other_pool[] =
       "pool other_toolchain_other_pool\n"
       "  depth = 42\n";
   const char expected_toolchain[] =
       "subninja toolchain.ninja\n";
   const char expected_targets[] =
       "build bar: phony obj/bar/bar.stamp\n"
       "build foo$:bar: phony obj/foo/bar.stamp\n"
       "build bar$:bar: phony obj/bar/bar.stamp\n";
   const char expected_root_target[] =
       "build all: phony $\n"
       "    obj/foo/bar.stamp $\n"
       "    obj/bar/bar.stamp\n";
   const char expected_default[] =
       "default all\n";
   std::string out_str = ninja_out.str();
 #define EXPECT_SNIPPET(expected) \
     EXPECT_NE(std::string::npos, out_str.find(expected)) << \
         "Expected to find: " << expected << std::endl << \
         "Within: " << out_str
   EXPECT_SNIPPET(expected_rule_gn);
   EXPECT_SNIPPET(expected_build_ninja);
-  EXPECT_SNIPPET(expected_link_pool);
   EXPECT_SNIPPET(expected_other_pool);
   EXPECT_SNIPPET(expected_toolchain);
   EXPECT_SNIPPET(expected_targets);
   EXPECT_SNIPPET(expected_root_target);
   EXPECT_SNIPPET(expected_default);
 #undef EXPECT_SNIPPET
 }
 
 TEST(NinjaBuildWriter, DuplicateOutputs) {
   Scheduler scheduler;
@@ skipping 31 matching lines @@
       "\n"
       "This is can often be fixed by changing one of the target names, or by \n"
       "setting an output_name on one of them.\n"
       "\n"
       "Collisions:\n"
       "  //foo:bar\n"
       "  //bar:bar\n";
 
   EXPECT_EQ(expected_help_test, err.help_text());
 }