Allow GN toolchains to specify runtime deps outputs.

tools/gn/function_toolchain_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 "testing/gtest/include/gtest/gtest.h"
+#include "tools/gn/functions.h"
+#include "tools/gn/scheduler.h"
+#include "tools/gn/test_with_scope.h"
+
+TEST(FunctionToolchain, RuntimeOutputs) {
+  Scheduler scheduler;
+  TestWithScope setup;
+
+  // These runtime outputs are a subset of the outputs so are OK.
+  {
+    TestParseInput input(
+        "toolchain(\"good\") {\n"
+        "  tool(\"link\") {\n"
+        "    outputs = [ \"foo\" ]\n"
+        "    runtime_outputs = [ \"foo\" ]\n"
+        "  }\n"
+        "}\n");
+    ASSERT_FALSE(input.has_error());
+
+    Err err;
+    input.parsed()->Execute(setup.scope(), &err);
+    ASSERT_FALSE(err.has_error()) << err.message();
+
+    // It should have generated a toolchain.
+    ASSERT_EQ(1u, setup.items().size());
+    const Toolchain* toolchain = setup.items()[0]->AsToolchain();
+    ASSERT_TRUE(toolchain);
+
+    // The toolchain should have a link tool with the two outputs.
+    const Tool* link = toolchain->GetTool(Toolchain::TYPE_LINK);
+    ASSERT_TRUE(link);
+    ASSERT_EQ(1u, link->outputs().list().size());
+    EXPECT_EQ("foo", link->outputs().list()[0].AsString());
+    ASSERT_EQ(1u, link->runtime_outputs().list().size());
+    EXPECT_EQ("foo", link->runtime_outputs().list()[0].AsString());
+  }
+
+  // This one is not a subset so should throw an error.
+  {
+    TestParseInput input(
+        "toolchain(\"bad\") {\n"
+        "  tool(\"link\") {\n"
+        "    outputs = [ \"foo\" ]\n"
+        "    runtime_outputs = [ \"bar\" ]\n"
+        "  }\n"
+        "}\n");
+    ASSERT_FALSE(input.has_error());
+
+    Err err;
+    input.parsed()->Execute(setup.scope(), &err);
+    ASSERT_TRUE(err.has_error()) << err.message();
+  }
+}