Convert some third_party deps to GN

tools/gn/target.cc

 // Copyright (c) 2013 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/target.h"
 
 #include "base/bind.h"
 #include "tools/gn/config_values_extractors.h"
 #include "tools/gn/scheduler.h"
 
@@ skipping 56 matching lines @@
     case UNKNOWN:
       return "Unknown";
     case GROUP:
       return "Group";
     case EXECUTABLE:
       return "Executable";
     case SHARED_LIBRARY:
       return "Shared library";
     case STATIC_LIBRARY:
       return "Static library";
+    case SOURCE_SET:
+      return "Source set";
     case COPY_FILES:
       return "Copy";
     case ACTION:
       return "Action";
     case ACTION_FOREACH:
       return "ActionForEach";
     default:
       return "";
   }
 }
@@ skipping 121 matching lines @@
 
 void Target::PullRecursiveHardDeps() {
   for (size_t dep_i = 0; dep_i < deps_.size(); dep_i++) {
     const Target* dep = deps_[dep_i].ptr;
     if (dep->hard_dep())
       recursive_hard_deps_.insert(dep);
     recursive_hard_deps_.insert(dep->recursive_hard_deps().begin(),
                                 dep->recursive_hard_deps().end());
   }
 }