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

tools/gn/bundle_data.h

Index: tools/gn/bundle_data.h
diff --git a/tools/gn/bundle_data.h b/tools/gn/bundle_data.h
index 3a1ce95ab7c10d4a33b475fd01463180b90a57bd..0b040f7f5b29bd627c33e095d3260a7ab26eedce 100644
--- a/tools/gn/bundle_data.h
+++ b/tools/gn/bundle_data.h
@@ -8,12 +8,14 @@
 #include <string>
 #include <vector>
 
+#include "tools/gn/action_values.h"
 #include "tools/gn/bundle_file_rule.h"
 #include "tools/gn/source_dir.h"
+#include "tools/gn/source_file.h"
+#include "tools/gn/substitution_list.h"
 #include "tools/gn/unique_vector.h"
 
 class OutputFile;
-class SourceFile;
 class Settings;
 class Target;
 
@@ -104,6 +106,28 @@ class BundleData {
   std::string& product_type() { return product_type_; }
   const std::string& product_type() const { return product_type_; }
 
+  void set_code_signing_script(const SourceFile& script_file) {
+    code_signing_script_ = script_file;
+  }
+  const SourceFile& code_signing_script() const { return code_signing_script_; }
+
+  std::vector<SourceFile>& code_signing_sources() {
+    return code_signing_sources_;
+  }
+  const std::vector<SourceFile>& code_signing_sources() const {
+    return code_signing_sources_;
+  }
+
+  SubstitutionList& code_signing_outputs() { return code_signing_outputs_; }
+  const SubstitutionList& code_signing_outputs() const {
+    return code_signing_outputs_;
+  }
+
+  SubstitutionList& code_signing_args() { return code_signing_args_; }
+  const SubstitutionList& code_signing_args() const {
+    return code_signing_args_;
+  }
+
   // Recursive collection of all bundle_data that the target depends on.
   const UniqueTargets& bundle_deps() const { return bundle_deps_; }
 
@@ -123,6 +147,13 @@ class BundleData {
   // the Xcode project file when using --ide=xcode.
   std::string product_type_;
 
+  // Holds the values (script name, sources, outputs, script arguments) for the
+  // code signing step if defined.
+  SourceFile code_signing_script_;
+  std::vector<SourceFile> code_signing_sources_;
+  SubstitutionList code_signing_outputs_;
+  SubstitutionList code_signing_args_;
+
   DISALLOW_COPY_AND_ASSIGN(BundleData);
 };