[GN]: Support for loadable modules

tools/gn/target.h

Index: tools/gn/target.h
diff --git a/tools/gn/target.h b/tools/gn/target.h
index fc752acece8896611b2f12047d723e69e3615bad..67e0e749a3be8a36aa6e0536e4efce55bf67d0dc 100644
--- a/tools/gn/target.h
+++ b/tools/gn/target.h
@@ -35,6 +35,7 @@ class Target : public Item {
     GROUP,
     EXECUTABLE,
     SHARED_LIBRARY,
+    LOADABLE_MODULE,
     STATIC_LIBRARY,
     SOURCE_SET,
     COPY_FILES,
@@ -115,6 +116,14 @@ class Target : public Item {
   bool testonly() const { return testonly_; }
   void set_testonly(bool value) { testonly_ = value; }
 
+  // Whether this target should produce a bundle on Darwin platforms. A bundle
+  // is a directory with a standardized hierarchical structure that holds
+  // executable code and the resources used by that code. Examples are
+  // application bundles (.app) or framework bundles (.framework) with the
+  // former corresponding to executables and the latter to shared libraries.
+  bool darwin_bundle() const { return darwin_bundle_; }
+  void set_darwin_bundle(bool value) { darwin_bundle_ = value; }
+
   // Compile-time extra dependencies.
   const FileList& inputs() const { return inputs_; }
   FileList& inputs() { return inputs_; }
@@ -279,6 +288,7 @@ class Target : public Item {
   bool check_includes_;
   bool complete_static_lib_;
   bool testonly_;
+  bool darwin_bundle_;
   FileList inputs_;
   std::vector<std::string> data_;