Support spaces in Mac GN build output names.

tools/gn/substitution_writer.cc

 // 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.
 
 #include "tools/gn/substitution_writer.h"
 
 #include "tools/gn/build_settings.h"
 #include "tools/gn/escape.h"
 #include "tools/gn/filesystem_utils.h"
 #include "tools/gn/output_file.h"
@@ skipping 404 matching lines @@
 bool SubstitutionWriter::GetTargetSubstitution(
     const Target* target,
     SubstitutionType type,
     std::string* result) {
   switch (type) {
     case SUBSTITUTION_LABEL:
       // Only include the toolchain for non-default toolchains.
       *result = target->label().GetUserVisibleName(
           !target->settings()->is_default());
       break;
+    case SUBSTITUTION_LABEL_NAME:
+      *result = target->label().name();
+      break;
     case SUBSTITUTION_ROOT_GEN_DIR:
       SetDirOrDotWithNoSlash(
           GetToolchainGenDirAsOutputFile(target->settings()).value(),
           result);
       break;
     case SUBSTITUTION_ROOT_OUT_DIR:
       SetDirOrDotWithNoSlash(
           target->settings()->toolchain_output_subdir().value(),
           result);
       break;
@@ skipping 112 matching lines @@
       // does not include the dot but the tool's does.
       if (target->output_extension().empty())
         return tool->default_output_extension();
       return std::string(".") + target->output_extension();
 
     default:
       NOTREACHED();
       return std::string();
   }
 }