[GN] Add support for code signing to "create_bundle" targets.

tools/gn/bundle_data.cc

Index: tools/gn/bundle_data.cc
diff --git a/tools/gn/bundle_data.cc b/tools/gn/bundle_data.cc
index e1823653ba497cc7ec8764712a1f369dd1287391..4218a150e1c9f6ff70ce1f31c0575cf79aa42ac4 100644
--- a/tools/gn/bundle_data.cc
+++ b/tools/gn/bundle_data.cc
@@ -8,6 +8,7 @@
 #include "tools/gn/filesystem_utils.h"
 #include "tools/gn/output_file.h"
 #include "tools/gn/settings.h"
+#include "tools/gn/substitution_writer.h"
 #include "tools/gn/target.h"
 
 namespace {
@@ -82,6 +83,10 @@ void BundleData::GetSourceFiles(SourceFiles* sources) const {
   }
   sources->insert(sources->end(), asset_catalog_sources_.begin(),
                   asset_catalog_sources_.end());
+  if (!code_signing_script_.is_null()) {
+    sources->insert(sources->end(), code_signing_sources_.begin(),
+                    code_signing_sources_.end());
+  }
 }
 
 void BundleData::GetOutputFiles(const Settings* settings,
@@ -105,6 +110,15 @@ void BundleData::GetOutputsAsSourceFiles(
   if (!asset_catalog_sources_.empty())
     outputs_as_source->push_back(GetCompiledAssetCatalogPath());
 
+  if (!code_signing_script_.is_null()) {
+    std::vector<SourceFile> code_signing_output_files;
+    SubstitutionWriter::GetListAsSourceFiles(code_signing_outputs_,
+                                             &code_signing_output_files);
+    outputs_as_source->insert(outputs_as_source->end(),
+                              code_signing_output_files.begin(),
+                              code_signing_output_files.end());
+  }
+
   if (!root_dir_.is_null())
     outputs_as_source->push_back(GetBundleRootDirOutput(settings));
 }