[GN]: Support for loadable modules

tools/gn/variables.cc

Index: tools/gn/variables.cc
diff --git a/tools/gn/variables.cc b/tools/gn/variables.cc
index d4e978d334a6e195d89583cee94ccab79609a0f6..75254e3e501add402222cecb4021988b7670d0ab 100644
--- a/tools/gn/variables.cc
+++ b/tools/gn/variables.cc
@@ -611,6 +611,22 @@ const char kConsole_Help[] =
     "    console = true\n"
     "  }\n";
 
+const char kDarwinBundle[] = "darwin_bundle";
+const char kDarwinBundle_HelpShort[] =
+    "darwin_bundle: [boolean] Produce a bundle on Darwin platforms";
+const char kDarwinBundle_Help[] =
+    "darwin_bundle: Produce an .app or .framework directory.\n"
+    "\n"
+    "  Bundles on Darwin platforms are directories with standardized\n"
+    "  hierarchical structures that hold executable code and the resources\n"
+    "  used by that code.\n"
+    "\n"
+    "Example\n"
+    "\n"
+    "  executable(\"combustible_lemons_app\") {\n"
+    "    darwin_bundle = true\n"
+    "  }\n";
+
 const char kData[] = "data";
 const char kData_HelpShort[] =
     "data: [file list] Runtime data file dependencies.";