Add support for Mac/iOS application bundles to GN tool.

tools/gn/functions.h

Index: tools/gn/functions.h
diff --git a/tools/gn/functions.h b/tools/gn/functions.h
index b746515625cccb4d332547f90674dcb390a97e44..52e8c9fa816bf7eed3ff12189d1249289fbe9434 100644
--- a/tools/gn/functions.h
+++ b/tools/gn/functions.h
@@ -96,6 +96,14 @@ Value RunCopy(const FunctionCallNode* function,
               Scope* block_scope,
               Err* err);
 
+extern const char kCopyBundleData[];
+extern const char kCopyBundleData_HelpShort[];
+extern const char kCopyBundleData_Help[];
+Value RunCopyBundleData(const FunctionCallNode* function,
+                        const std::vector<Value>& args,
+                        Scope* block_scope,
+                        Err* err);
+
 extern const char kDeclareArgs[];
 extern const char kDeclareArgs_HelpShort[];
 extern const char kDeclareArgs_Help[];